
#L. C. Wheeler, A. Perkins, C. E. Wong, and M. J. Harms,
#“Learning peptide recognition rules for a low-specificity protein,” Protein Sci.
#, vol. 29, no. 11, pp. 2259–2273, 2020.
# Map each aaindex feature to a category. These categories are not strictly separable, but
# should provide some information about the underlying features of amino acids that are
# being discovered by the machine learning tool.
#
# The categories are:
#
# charge        Information about charge state, ionization, pKa values, etc.
# composition   Composition is a rough category holding things like the relative frequency of
#               this amino acid in some environment or some class of proteins.
# flexibility   Measures of flexibility.  These include conformational entropy terms, linker
#               propensity, and actual flexibility parameters.
# geometry      Sidechain geometry parameters including molecular weight, volume, typical
#               contact order, various reduced descriptions of sidechain geometry, etc.
# hydrophobic   Measures of hydrophobicity including transfer free energies, calculated
#               solvation energies, fraction buried, and surface area
# meta          Parameters that are, themselves, aggregate PCA-like parameters that cannot be
#               usefully decomposed
# observable    Some observable like refractive index or chemical shift that cannot be easily
#               connected back to a physical property
# polar         Measures of polarity and hydrophilicity.  This could probably be effectively
#               combined with hydrophobicity into a single category.
# sec_struct    Secondary structure propensity scores, including turns.
#
#aaindex      category      aaindex description
ANDN920101	  observable    alpha-CH chemical shifts (Andersen et al., 1992)
ARGP820101	  hydrophobic   Hydrophobicity index (Argos et al., 1982)
ARGP820102	  sec_struct    Signal sequence helical potential (Argos et al., 1982)
ARGP820103	  composition   Membrane-buried preference parameters (Argos et al., 1982)
AURR980101	  sec_struct    positional residue frequency at helix termini N4'(Aurora-Rose, 1998)
AURR980102	  sec_struct    positional residue frequency at helix termini N'' (Aurora-Rose, 1998)
AURR980103	  sec_struct    positional residue frequency at helix termini N' (Aurora-Rose, 1998)
AURR980104	  sec_struct    positional residue frequency at helix termini N'(Aurora-Rose, 1998)
AURR980105	  sec_struct    positional residue frequency at helix termini Nc (Aurora-Rose, 1998)
AURR980106	  sec_struct    positional residue frequency at helix termini N1 (Aurora-Rose, 1998)
AURR980107	  sec_struct    positional residue frequency at helix termini N2 (Aurora-Rose, 1998)
AURR980108	  sec_struct    positional residue frequency at helix termini N3 (Aurora-Rose, 1998)
AURR980109	  sec_struct    positional residue frequency at helix termini N4 (Aurora-Rose, 1998)
AURR980110	  sec_struct    positional residue frequency at helix termini N5 (Aurora-Rose, 1998)
AURR980111	  sec_struct    positional residue frequency at helix termini C5 (Aurora-Rose, 1998)
AURR980112	  sec_struct    positional residue frequency at helix termini C4 (Aurora-Rose, 1998)
AURR980113	  sec_struct    positional residue frequency at helix termini C3 (Aurora-Rose, 1998)
AURR980114	  sec_struct    positional residue frequency at helix termini C2 (Aurora-Rose, 1998)
AURR980115	  sec_struct    positional residue frequency at helix termini C1 (Aurora-Rose, 1998)
AURR980116	  sec_struct    positional residue frequency at helix termini Cc (Aurora-Rose, 1998)
AURR980117	  sec_struct    positional residue frequency at helix termini C' (Aurora-Rose, 1998)
AURR980118	  sec_struct    positional residue frequency at helix termini C' (Aurora-Rose, 1998)
AURR980119	  sec_struct    positional residue frequency at helix termini C'' (Aurora-Rose, 1998)
AURR980120	  sec_struct    positional residue frequency at helix termini C4' (Aurora-Rose, 1998)
AVBF000101	  polar         Screening coefficients gamma, local (Avbelj, 2000)
AVBF000102	  polar         Screening coefficients gamma, non-local (Avbelj, 2000)
AVBF000103	  polar         Slopes tripeptide, FDPB VFF neutral (Avbelj, 2000)
AVBF000104	  polar         Slopes tripeptides, LD VFF neutral (Avbelj, 2000)
AVBF000105	  polar         Slopes tripeptide, FDPB VFF noside (Avbelj, 2000)
AVBF000106	  polar         Slopes tripeptide FDPB VFF all (Avbelj, 2000)
AVBF000107	  polar         Slopes tripeptide FDPB PARSE neutral (Avbelj, 2000)
AVBF000108	  polar         Slopes dekapeptide, FDPB VFF neutral (Avbelj, 2000)
AVBF000109	  polar         Slopes proteins, FDPB VFF neutral (Avbelj, 2000)
BAEK050101	  flexibility   Linker index (Bae et al., 2005)
BASU050101	  geometry      Interactivity scale obtained from the contact matrix (Bastolla et al., 2005)
BASU050102	  geometry      Interactivity scale obtained by maximizing the mean of correlation coefficient over single-domain globular proteins (Bastolla et al., 2005)
BASU050103	  geometry      Interactivity scale obtained by maximizing the mean of correlation coefficient over pairs of sequences sharing the TIM barrel fold (Bastolla et al., 2005)
BEGF750101	  sec_struct    Conformational parameter of inner helix (Beghin-Dirkx, 1975)
BEGF750102	  sec_struct    Conformational parameter of beta-structure (Beghin-Dirkx, 1975)
BEGF750103	  sec_struct    Conformational parameter of beta-turn (Beghin-Dirkx, 1975)
BHAR880101	  flexibility   Average flexibility indices (Bhaskaran-Ponnuswamy, 1988)
BIGC670101	  geometry      Residue volume (Bigelow, 1967)
BIOV880101	  hydrophobic   Information value for accessibility; average fraction 35% (Biou et al., 1988)
BIOV880102	  hydrophobic   Information value for accessibility; average fraction 23% (Biou et al., 1988)
BLAM930101	  sec_struct    Alpha helix propensity of position 44 in T4 lysozyme (Blaber et al., 1993)
BLAS910101	  hydrophobic   Scaled side chain hydrophobicity values (Black-Mould, 1991)
BROC820101	  hydrophobic   Retention coefficient in TFA (Browne et al., 1982)
BROC820102	  hydrophobic   Retention coefficient in HFBA (Browne et al., 1982)
BULH740101	  hydrophobic   Transfer free energy to surface (Bull-Breese, 1974)
BULH740102	  geometry      Apparent partial specific volume (Bull-Breese, 1974)
BUNA790101	  observable    alpha-NH chemical shifts (Bundi-Wuthrich, 1979)
BUNA790102	  observable    alpha-CH chemical shifts (Bundi-Wuthrich, 1979)
BUNA790103	  observable    Spin-spin coupling constants 3JHalpha-NH (Bundi-Wuthrich, 1979)
BURA740101	  sec_struct    Normalized frequency of alpha-helix (Burgess et al., 1974)
BURA740102	  sec_struct    Normalized frequency of extended structure (Burgess et al., 1974)
CASG920101	  hydrophobic   Hydrophobicity scale from native protein structures (Casari-Sippl, 1992)
CEDJ970101	  composition   Composition of amino acids in extracellular proteins (percent) (Cedano et al., 1997)
CEDJ970102	  composition   Composition of amino acids in anchored proteins (percent) (Cedano et al., 1997)
CEDJ970103	  composition   Composition of amino acids in membrane proteins (percent) (Cedano et al., 1997)
CEDJ970104	  composition   Composition of amino acids in intracellular proteins (percent) (Cedano et al., 1997)
CEDJ970105	  composition   Composition of amino acids in nuclear proteins (percent) (Cedano et al., 1997)
CHAM810101	  geometry      Steric parameter (Charton, 1981)
CHAM820101	  polar         Polarizability parameter (Charton-Charton, 1982)
CHAM820102	  hydrophobic   Free energy of solution in water, kcal/mole (Charton-Charton, 1982)
CHAM830101	  sec_struct    The Chou-Fasman parameter of the coil conformation (Charton-Charton, 1983)
CHAM830102	  sec_struct    A parameter defined from the residuals obtained from the best correlation of the Chou-Fasman parameter of beta-sheet (Charton-Charton, 1983)
CHAM830103	  geometry      The number of atoms in the side chain labelled 1+1 (Charton-Charton, 1983)
CHAM830104	  geometry      The number of atoms in the side chain labelled 2+1 (Charton-Charton, 1983)
CHAM830105	  geometry      The number of atoms in the side chain labelled 3+1 (Charton-Charton, 1983)
CHAM830106	  geometry      The number of bonds in the longest chain (Charton-Charton, 1983)
CHAM830107	  geometry      A parameter of charge transfer capability (Charton-Charton, 1983)
CHAM830108	  geometry      A parameter of charge transfer donor capability (Charton-Charton, 1983)
CHOC750101	  geometry      Average volume of buried residue (Chothia, 1975)
CHOC760101	  hydrophobic   Residue accessible surface area in tripeptide (Chothia, 1976)
CHOC760102	  hydrophobic   Residue accessible surface area in folded protein (Chothia, 1976)
CHOC760103	  hydrophobic   Proportion of residues 95% buried (Chothia, 1976)
CHOC760104	  hydrophobic   Proportion of residues 100% buried (Chothia, 1976)
CHOP780101	  sec_struct    Normalized frequency of beta-turn (Chou-Fasman, 1978a)
CHOP780201	  sec_struct    Normalized frequency of alpha-helix (Chou-Fasman, 1978b)
CHOP780202	  sec_struct    Normalized frequency of beta-sheet (Chou-Fasman, 1978b)
CHOP780203	  sec_struct    Normalized frequency of beta-turn (Chou-Fasman, 1978b)
CHOP780204	  sec_struct    Normalized frequency of N-terminal helix (Chou-Fasman, 1978b)
CHOP780205	  sec_struct    Normalized frequency of C-terminal helix (Chou-Fasman, 1978b)
CHOP780206	  sec_struct    Normalized frequency of N-terminal non helical region (Chou-Fasman, 1978b)
CHOP780207	  sec_struct    Normalized frequency of C-terminal non helical region (Chou-Fasman, 1978b)
CHOP780208	  sec_struct    Normalized frequency of N-terminal beta-sheet (Chou-Fasman, 1978b)
CHOP780209	  sec_struct    Normalized frequency of C-terminal beta-sheet (Chou-Fasman, 1978b)
CHOP780210	  sec_struct    Normalized frequency of N-terminal non beta region (Chou-Fasman, 1978b)
CHOP780211	  sec_struct    Normalized frequency of C-terminal non beta region (Chou-Fasman, 1978b)
CHOP780212	  sec_struct    Frequency of the 1st residue in turn (Chou-Fasman, 1978b)
CHOP780213	  sec_struct    Frequency of the 2nd residue in turn (Chou-Fasman, 1978b)
CHOP780214	  sec_struct    Frequency of the 3rd residue in turn (Chou-Fasman, 1978b)
CHOP780215	  sec_struct    Frequency of the 4th residue in turn (Chou-Fasman, 1978b)
CHOP780216	  sec_struct    Normalized frequency of the 2nd and 3rd residues in turn (Chou-Fasman, 1978b)
CIDH920101	  hydrophobic   Normalized hydrophobicity scales for alpha-proteins (Cid et al., 1992)
CIDH920102	  hydrophobic   Normalized hydrophobicity scales for beta-proteins (Cid et al., 1992)
CIDH920103	  hydrophobic   Normalized hydrophobicity scales for alpha+beta-proteins (Cid et al., 1992)
CIDH920104	  hydrophobic   Normalized hydrophobicity scales for alpha/beta-proteins (Cid et al., 1992)
CIDH920105	  hydrophobic   Normalized average hydrophobicity scales (Cid et al., 1992)
COHE430101	  geometry      Partial specific volume (Cohn-Edsall, 1943)
CORJ870101	  hydrophobic   NNEIG index (Cornette et al., 1987)
CORJ870102	  hydrophobic   SWEIG index (Cornette et al., 1987)
CORJ870103	  hydrophobic   PRIFT index (Cornette et al., 1987)
CORJ870104	  hydrophobic   PRILS index (Cornette et al., 1987)
CORJ870105	  hydrophobic   ALTFT index (Cornette et al., 1987)
CORJ870106	  hydrophobic   ALTLS index (Cornette et al., 1987)
CORJ870107	  hydrophobic   TOTFT index (Cornette et al., 1987)
CORJ870108	  hydrophobic   TOTLS index (Cornette et al., 1987)
COSI940101	  polar         Electron-ion interaction potential values (Cosic, 1994)
COWR900101	  hydrophobic   Hydrophobicity index, 3.0 pH (Cowan-Whittaker, 1990)
CRAJ730101	  sec_struct    Normalized frequency of middle helix (Crawford et al., 1973)
CRAJ730102	  sec_struct    Normalized frequency of beta-sheet (Crawford et al., 1973)
CRAJ730103	  sec_struct    Normalized frequency of turn (Crawford et al., 1973)
DAWD720101	  geometry      Size (Dawson, 1972)
DAYM780101	  composition   Amino acid composition (Dayhoff et al., 1978a)
DAYM780201	  composition   Relative mutability (Dayhoff et al., 1978b)
DESM900101	  composition   Membrane preference for cytochrome b: MPH89 (Degli Esposti et al., 1990)
DESM900102	  composition   Average membrane preference: AMP07 (Degli Esposti et al., 1990)
DIGM050101	  composition   Hydrostatic pressure asymmetry index, PAI (Di Giulio, 2005)
EISD840101	  hydrophobic   Consensus normalized hydrophobicity scale (Eisenberg, 1984)
EISD860101	  hydrophobic   Solvation free energy (Eisenberg-McLachlan, 1986)
EISD860102	  hydrophobic   Atom-based hydrophobic moment (Eisenberg-McLachlan, 1986)
EISD860103	  hydrophobic   Direction of hydrophobic moment (Eisenberg-McLachlan, 1986)
ENGD860101	  hydrophobic   Hydrophobicity index (Engelman et al., 1986)
FASG760101	  geometry      Molecular weight (Fasman, 1976)
FASG760102	  observable    Melting point (Fasman, 1976)
FASG760103	  observable    Optical rotation (Fasman, 1976)
FASG760104	  polar         pK-N (Fasman, 1976)
FASG760105	  polar         pK-C (Fasman, 1976)
FASG890101	  hydrophobic   Hydrophobicity index (Fasman, 1989)
FAUJ830101	  hydrophobic   Hydrophobic parameter pi (Fauchere-Pliska, 1983)
FAUJ880101	  geometry      Graph shape index (Fauchere et al., 1988)
FAUJ880102	  geometry      Smoothed upsilon steric parameter (Fauchere et al., 1988)
FAUJ880103	  geometry      Normalized van der Waals volume (Fauchere et al., 1988)
FAUJ880104	  geometry      STERIMOL length of the side chain (Fauchere et al., 1988)
FAUJ880105	  geometry      STERIMOL minimum width of the side chain (Fauchere et al., 1988)
FAUJ880106	  geometry      STERIMOL maximum width of the side chain (Fauchere et al., 1988)
FAUJ880107	  observable    N.m.r. chemical shift of alpha-carbon (Fauchere et al., 1988)
FAUJ880108	  polar         Localized electrical effect (Fauchere et al., 1988)
FAUJ880109	  polar         Number of hydrogen bond donors (Fauchere et al., 1988)
FAUJ880110	  geometry      Number of full nonbonding orbitals (Fauchere et al., 1988)
FAUJ880111	  polar         Positive charge (Fauchere et al., 1988)
FAUJ880112	  polar         Negative charge (Fauchere et al., 1988)
FAUJ880113	  polar         pK-a(RCOOH) (Fauchere et al., 1988)
FINA770101	  sec_struct    Helix-coil equilibrium constant (Finkelstein-Ptitsyn, 1977)
FINA910101	  sec_struct    Helix initiation parameter at posision i-1 (Finkelstein et al., 1991)
FINA910102	  sec_struct    Helix initiation parameter at posision i,i+1,i+2 (Finkelstein et al., 1991)
FINA910103	  sec_struct    Helix termination parameter at posision j-2,j-1,j (Finkelstein et al., 1991)
FINA910104	  sec_struct    Helix termination parameter at posision j+1 (Finkelstein et al., 1991)
FODM020101	  sec_struct    Propensity of amino acids within pi-helices (Fodje-Al-Karadaghi, 2002)
FUKS010101	  composition   Surface composition of amino acids in intracellular proteins of thermophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010102	  composition   Surface composition of amino acids in intracellular proteins of mesophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010103	  composition   Surface composition of amino acids in extracellular proteins of mesophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010104	  composition   Surface composition of amino acids in nuclear proteins (percent) (Fukuchi-Nishikawa, 2001)
FUKS010105	  composition   Interior composition of amino acids in intracellular proteins of thermophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010106	  composition   Interior composition of amino acids in intracellular proteins of mesophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010107	  composition   Interior composition of amino acids in extracellular proteins of mesophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010108	  composition   Interior composition of amino acids in nuclear proteins (percent) (Fukuchi-Nishikawa, 2001)
FUKS010109	  composition   Entire chain composition of amino acids in intracellular proteins of thermophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010110	  composition   Entire chain composition of amino acids in intracellular proteins of mesophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010111	  composition   Entire chain composition of amino acids in extracellular proteins of mesophiles (percent) (Fukuchi-Nishikawa, 2001)
FUKS010112	  composition   Entire chain compositino of amino acids in nuclear proteins (percent) (Fukuchi-Nishikawa, 2001)
GARJ730101	  hydrophobic   Partition coefficient (Garel et al., 1973)
GEIM800101	  sec_struct    Alpha-helix indices (Geisow-Roberts, 1980)
GEIM800102	  sec_struct    Alpha-helix indices for alpha-proteins (Geisow-Roberts, 1980)
GEIM800103	  sec_struct    Alpha-helix indices for beta-proteins (Geisow-Roberts, 1980)
GEIM800104	  sec_struct    Alpha-helix indices for alpha/beta-proteins (Geisow-Roberts, 1980)
GEIM800105	  sec_struct    Beta-strand indices (Geisow-Roberts, 1980)
GEIM800106	  sec_struct    Beta-strand indices for beta-proteins (Geisow-Roberts, 1980)
GEIM800107	  sec_struct    Beta-strand indices for alpha/beta-proteins (Geisow-Roberts, 1980)
GEIM800108	  sec_struct    Aperiodic indices (Geisow-Roberts, 1980)
GEIM800109	  sec_struct    Aperiodic indices for alpha-proteins (Geisow-Roberts, 1980)
GEIM800110	  sec_struct    Aperiodic indices for beta-proteins (Geisow-Roberts, 1980)
GEIM800111	  sec_struct    Aperiodic indices for alpha/beta-proteins (Geisow-Roberts, 1980)
GEOR030101	  sec_struct    Linker propensity from all dataset (George-Heringa, 2003)
GEOR030102	  sec_struct    Linker propensity from 1-linker dataset (George-Heringa, 2003)
GEOR030103	  sec_struct    Linker propensity from 2-linker dataset (George-Heringa, 2003)
GEOR030104	  sec_struct    Linker propensity from 3-linker dataset (George-Heringa, 2003)
GEOR030105	  sec_struct    Linker propensity from small dataset (linker length is less than six residues) (George-Heringa, 2003)
GEOR030106	  sec_struct    Linker propensity from medium dataset (linker length is between six and 14 residues) (George-Heringa, 2003)
GEOR030107	  sec_struct    Linker propensity from long dataset (linker length is greater than 14 residues) (George-Heringa, 2003)
GEOR030108	  sec_struct    Linker propensity from helical (annotated by DSSP) dataset (George-Heringa, 2003)
GEOR030109	  sec_struct    Linker propensity from non-helical (annotated by DSSP) dataset (George-Heringa, 2003)
GOLD730101	  hydrophobic   Hydrophobicity factor (Goldsack-Chalifoux, 1973)
GOLD730102	  geometry      Residue volume (Goldsack-Chalifoux, 1973)
GRAR740101	  composition   Composition (Grantham, 1974)
GRAR740102	  polar         Polarity (Grantham, 1974)
GRAR740103	  geometry      Volume (Grantham, 1974)
GUOD860101	  polar         Retention coefficient at pH 2 (Guo et al., 1986)
GUYH850101	  hydrophobic   Partition energy (Guy, 1985)
GUYH850102	  hydrophobic   Apparent partition energies calculated from Wertz-Scheraga index (Guy, 1985)
GUYH850103	  hydrophobic   Apparent partition energies calculated from Robson-Osguthorpe index (Guy, 1985)
GUYH850104	  hydrophobic   Apparent partition energies calculated from Janin index (Guy, 1985)
GUYH850105	  hydrophobic   Apparent partition energies calculated from Chothia index (Guy, 1985)
HARY940101	  geometry      Mean volumes of residues buried in protein interiors (Harpaz et al., 1994)
HOPA770101	  polar         Hydration number (Hopfinger, 1971), Cited by Charton-Charton (1982)
HOPT810101	  polar         Hydrophilicity value (Hopp-Woods, 1981)
HUTJ700101	  hydrophobic   Heat capacity (Hutchens, 1970)
HUTJ700102	  flexibility   Absolute entropy (Hutchens, 1970)
HUTJ700103	  flexibility   Entropy of formation (Hutchens, 1970)
ISOY800101	  sec_struct    Normalized relative frequency of alpha-helix (Isogai et al., 1980)
ISOY800102	  sec_struct    Normalized relative frequency of extended structure (Isogai et al., 1980)
ISOY800103	  sec_struct    Normalized relative frequency of bend (Isogai et al., 1980)
ISOY800104	  sec_struct    Normalized relative frequency of bend R (Isogai et al., 1980)
ISOY800105	  sec_struct    Normalized relative frequency of bend S (Isogai et al., 1980)
ISOY800106	  sec_struct    Normalized relative frequency of helix end (Isogai et al., 1980)
ISOY800107	  sec_struct    Normalized relative frequency of double bend (Isogai et al., 1980)
ISOY800108	  sec_struct    Normalized relative frequency of coil (Isogai et al., 1980)
JACR890101	  hydrophobic   Weights from the IFH scale (Jacobs-White, 1989)
JANJ780101	  hydrophobic   Average accessible surface area (Janin et al., 1978)
JANJ780102	  hydrophobic   Percentage of buried residues (Janin et al., 1978)
JANJ780103	  hydrophobic   Percentage of exposed residues (Janin et al., 1978)
JANJ790101	  hydrophobic   Ratio of buried and accessible molar fractions (Janin, 1979)
JANJ790102	  hydrophobic   Transfer free energy (Janin, 1979)
JOND750101	  hydrophobic   Hydrophobicity (Jones, 1975)
JOND750102	  charge        pK (-COOH) (Jones, 1975)
JOND920101	  composition   Relative frequency of occurrence (Jones et al., 1992)
JOND920102	  composition   Relative mutability (Jones et al., 1992)
JUKT750101	  composition   Amino acid distribution (Jukes et al., 1975)
JUNJ780101	  composition   Sequence frequency (Jungck, 1978)
JURD980101	  hydrophobic   Modified Kyte-Doolittle hydrophobicity scale (Juretic et al., 1998)
KANM800101	  sec_struct    Average relative probability of helix (Kanehisa-Tsong, 1980)
KANM800102	  sec_struct    Average relative probability of beta-sheet (Kanehisa-Tsong, 1980)
KANM800103	  sec_struct    Average relative probability of inner helix (Kanehisa-Tsong, 1980)
KANM800104	  sec_struct    Average relative probability of inner beta-sheet (Kanehisa-Tsong, 1980)
KARP850101	  flexibility   Flexibility parameter for no rigid neighbors (Karplus-Schulz, 1985)
KARP850102	  flexibility   Flexibility parameter for one rigid neighbor (Karplus-Schulz, 1985)
KARP850103	  flexibility   Flexibility parameter for two rigid neighbors (Karplus-Schulz, 1985)
KARS160101	  meta          Number of vertices (order of the graph) (Karkbara-Knisley, 2016)
KARS160102	  meta          Number of edges (size of the graph) (Karkbara-Knisley, 2016)
KARS160103	  meta          Total weighted degree of the graph (obtained by adding all the weights of all the vertices) (Karkbara-Knisley, 2016)
KARS160104	  meta          Weighted domination number (Karkbara-Knisley, 2016)
KARS160105	  meta          Average eccentricity (Karkbara-Knisley, 2016)
KARS160106	  meta          Radius (minimum eccentricity) (Karkbara-Knisley, 2016)
KARS160107	  meta          Diameter (maximum eccentricity) (Karkbara-Knisley, 2016)
KARS160108	  meta          Average weighted degree (total degree, divided by the number of vertices) (Karkbara-Knisley, 2016)
KARS160109	  meta          Maximum eigenvalue of the weighted Laplacian matrix of the graph (Karkbara-Knisley, 2016)
KARS160110	  meta          Minimum eigenvalue of the weighted Laplacian matrix of the graph (Karkbara-Knisley, 2016)
KARS160111	  meta          Average eigenvalue of the Laplacian matrix of the the graph (Karkbara-Knisley, 2016)
KARS160112	  meta          Second smallest eigenvalue of the Laplacian matrix of the graph (Karkbara-Knisley, 2016)
KARS160113	  meta          Weighted domination number using the atomic number (Karkbara-Knisley, 2016)
KARS160114	  meta          Average weighted eccentricity based on the the atomic number (Karkbara-Knisley, 2016)
KARS160115	  meta          Weighted radius based on the atomic number (minimum eccentricity) (Karkbara-Knisley, 2016)
KARS160116	  meta          Weighted diameter based on the atomic number (maximum eccentricity) (Karkbara-Knisley, 2016)
KARS160117	  meta          Total weighted atomic number of the graph (obtained by summing all the atomic number of each of the vertices in the graph) (Karkbara-Knisley, 2016)
KARS160118	  meta          Average weighted atomic number or degree based on atomic number in the graph (Karkbara-Knisley, 2016)
KARS160119	  meta          Weighted maximum eigenvalue based on the atomic numbers (Karkbara-Knisley, 2016)
KARS160120	  meta          Weighted minimum eigenvalue based on the atomic numbers (Karkbara-Knisley, 2016)
KARS160121	  meta          Weighted average eigenvalue based on the atomic numbers (Karkbara-Knisley, 2016)
KARS160122	  meta          Weighted second smallest eigenvalue of the weighted Laplacian matrix (Karkbara-Knisley, 2016)
KHAG800101	  meta          The Kerr-constant increments (Khanarian-Moore, 1980)
KIDA850101	  hydrophobic   Hydrophobicity-related index (Kidera et al., 1985)
KIMC930101	  sec_struct    Thermodynamic beta sheet propensity (Kim-Berg, 1993)
KLEP840101	  charge        Net charge (Klein et al., 1984)
KOEP990101	  sec_struct    Alpha-helix propensity derived from designed sequences (Koehl-Levitt, 1999)
KOEP990102	  sec_struct    Beta-sheet propensity derived from designed sequences (Koehl-Levitt, 1999)
KRIW710101	  geometry      Side chain interaction parameter (Krigbaum-Rubin, 1971)
KRIW790101	  geometry      Side chain interaction parameter (Krigbaum-Komoriya, 1979)
KRIW790102	  polar         Fraction of site occupied by water (Krigbaum-Komoriya, 1979)
KRIW790103	  geometry      Side chain volume (Krigbaum-Komoriya, 1979)
KUHL950101	  polar         Hydrophilicity scale (Kuhn et al., 1995)
KUMS000101	  composition   Distribution of amino acid residues in the 18 non-redundant families of thermophilic proteins (Kumar et al., 2000)
KUMS000102	  composition   Distribution of amino acid residues in the 18 non-redundant families of mesophilic proteins (Kumar et al., 2000)
KUMS000103	  composition   Distribution of amino acid residues in the alpha-helices in thermophilic proteins (Kumar et al., 2000)
KUMS000104	  composition   Distribution of amino acid residues in the alpha-helices in mesophilic proteins (Kumar et al., 2000)
KYTJ820101	  hydrophobic   Hydropathy index (Kyte-Doolittle, 1982)
LAWE840101	  hydrophobic   Transfer free energy, CHP/water (Lawson et al., 1984)
LEVM760101	  hydrophobic   Hydrophobic parameter (Levitt, 1976)
LEVM760102	  geometry      Distance between C-alpha and centroid of side chain (Levitt, 1976)
LEVM760103	  geometry      Side chain angle theta(AAR) (Levitt, 1976)
LEVM760104	  geometry      Side chain torsion angle phi(AAAR) (Levitt, 1976)
LEVM760105	  geometry      Radius of gyration of side chain (Levitt, 1976)
LEVM760106	  geometry      van der Waals parameter R0 (Levitt, 1976)
LEVM760107	  geometry      van der Waals parameter epsilon (Levitt, 1976)
LEVM780101	  sec_struct    Normalized frequency of alpha-helix, with weights (Levitt, 1978)
LEVM780102	  sec_struct    Normalized frequency of beta-sheet, with weights (Levitt, 1978)
LEVM780103	  sec_struct    Normalized frequency of reverse turn, with weights (Levitt, 1978)
LEVM780104	  sec_struct    Normalized frequency of alpha-helix, unweighted (Levitt, 1978)
LEVM780105	  sec_struct    Normalized frequency of beta-sheet, unweighted (Levitt, 1978)
LEVM780106	  sec_struct    Normalized frequency of reverse turn, unweighted (Levitt, 1978)
LEWP710101	  sec_struct    Frequency of occurrence in beta-bends (Lewis et al., 1971)
LIFS790101	  sec_struct    Conformational preference for all beta-strands (Lifson-Sander, 1979)
LIFS790102	  sec_struct    Conformational preference for parallel beta-strands (Lifson-Sander, 1979)
LIFS790103	  sec_struct    Conformational preference for antiparallel beta-strands (Lifson-Sander, 1979)
MANP780101	  hydrophobic   Average surrounding hydrophobicity (Manavalan-Ponnuswamy, 1978)
MAXF760101	  sec_struct    Normalized frequency of alpha-helix (Maxfield-Scheraga, 1976)
MAXF760102	  sec_struct    Normalized frequency of extended structure (Maxfield-Scheraga, 1976)
MAXF760103	  sec_struct    Normalized frequency of zeta R (Maxfield-Scheraga, 1976)
MAXF760104	  sec_struct    Normalized frequency of left-handed alpha-helix (Maxfield-Scheraga, 1976)
MAXF760105	  sec_struct    Normalized frequency of zeta L (Maxfield-Scheraga, 1976)
MAXF760106	  sec_struct    Normalized frequency of alpha region (Maxfield-Scheraga, 1976)
MCMT640101	  observable    Refractivity (McMeekin et al., 1964), Cited by Jones (1975)
MEEJ800101	  hydrophobic   Retention coefficient in HPLC, pH7.4 (Meek, 1980)
MEEJ800102	  hydrophobic   Retention coefficient in HPLC, pH2.1 (Meek, 1980)
MEEJ810101	  hydrophobic   Retention coefficient in NaClO4 (Meek-Rossetti, 1981)
MEEJ810102	  hydrophobic   Retention coefficient in NaH2PO4 (Meek-Rossetti, 1981)
MEIH800101	  geometry      Average reduced distance for C-alpha (Meirovitch et al., 1980)
MEIH800102	  geometry      Average reduced distance for side chain (Meirovitch et al., 1980)
MEIH800103	  geometry      Average side chain orientation angle (Meirovitch et al., 1980)
MITS020101	  hydrophobic   Amphiphilicity index (Mitaku et al., 2002)
MIYS850101	  hydrophobic   Effective partition energy (Miyazawa-Jernigan, 1985)
MIYS990101	  hydrophobic   Relative partition energies derived by the Bethe approximation (Miyazawa-Jernigan, 1999)
MIYS990102	  hydrophobic   Optimized relative partition energies - method A (Miyazawa-Jernigan, 1999)
MIYS990103	  hydrophobic   Optimized relative partition energies - method B (Miyazawa-Jernigan, 1999)
MIYS990104	  hydrophobic   Optimized relative partition energies - method C (Miyazawa-Jernigan, 1999)
MIYS990105	  hydrophobic   Optimized relative partition energies - method D (Miyazawa-Jernigan, 1999)
MONM990101	  sec_struct    Turn propensity scale for transmembrane helices (Monne et al., 1999)
MONM990201	  sec_struct    Averaged turn propensities in a transmembrane helix (Monne et al., 1999)
MUNV940101	  sec_struct    Free energy in alpha-helical conformation (Munoz-Serrano, 1994)
MUNV940102	  sec_struct    Free energy in alpha-helical region (Munoz-Serrano, 1994)
MUNV940103	  sec_struct    Free energy in beta-strand conformation (Munoz-Serrano, 1994)
MUNV940104	  sec_struct    Free energy in beta-strand region (Munoz-Serrano, 1994)
MUNV940105	  sec_struct    Free energy in beta-strand region (Munoz-Serrano, 1994)
NADH010101	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (5% accessibility) (Naderi-Manesh et al., 2001)
NADH010102	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (9% accessibility) (Naderi-Manesh et al., 2001)
NADH010103	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (16% accessibility) (Naderi-Manesh et al., 2001)
NADH010104	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (20% accessibility) (Naderi-Manesh et al., 2001)
NADH010105	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (25% accessibility) (Naderi-Manesh et al., 2001)
NADH010106	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (36% accessibility) (Naderi-Manesh et al., 2001)
NADH010107	  hydrophobic   Hydropathy scale based on self-information values in the two-state model (50% accessibility) (Naderi-Manesh et al., 2001)
NAGK730101	  sec_struct    Normalized frequency of alpha-helix (Nagano, 1973)
NAGK730102	  sec_struct    Normalized frequency of bata-structure (Nagano, 1973)
NAGK730103	  sec_struct    Normalized frequency of coil (Nagano, 1973)
NAKH900101	  composition   AA composition of total proteins (Nakashima et al., 1990)
NAKH900102	  composition   SD of AA composition of total proteins (Nakashima et al., 1990)
NAKH900103	  composition   AA composition of mt-proteins (Nakashima et al., 1990)
NAKH900104	  composition   Normalized composition of mt-proteins (Nakashima et al., 1990)
NAKH900105	  composition   AA composition of mt-proteins from animal (Nakashima et al., 1990)
NAKH900106	  composition   Normalized composition from animal (Nakashima et al., 1990)
NAKH900107	  composition   AA composition of mt-proteins from fungi and plant (Nakashima et al., 1990)
NAKH900108	  composition   Normalized composition from fungi and plant (Nakashima et al., 1990)
NAKH900109	  composition   AA composition of membrane proteins (Nakashima et al., 1990)
NAKH900110	  composition   Normalized composition of membrane proteins (Nakashima et al., 1990)
NAKH900111	  composition   Transmembrane regions of non-mt-proteins (Nakashima et al., 1990)
NAKH900112	  composition   Transmembrane regions of mt-proteins (Nakashima et al., 1990)
NAKH900113	  composition   Ratio of average and computed composition (Nakashima et al., 1990)
NAKH920101	  composition   AA composition of CYT of single-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920102	  composition   AA composition of CYT2 of single-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920103	  composition   AA composition of EXT of single-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920104	  composition   AA composition of EXT2 of single-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920105	  composition   AA composition of MEM of single-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920106	  composition   AA composition of CYT of multi-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920107	  composition   AA composition of EXT of multi-spanning proteins (Nakashima-Nishikawa, 1992)
NAKH920108	  composition   AA composition of MEM of multi-spanning proteins (Nakashima-Nishikawa, 1992)
NISK800101	  geometry      8 A contact number (Nishikawa-Ooi, 1980)
NISK860101	  geometry      14 A contact number (Nishikawa-Ooi, 1986)
NOZY710101	  hydrophobic   Transfer energy, organic solvent/water (Nozaki-Tanford, 1971)
OLSK800101	  geometry      Average internal preferences (Olsen, 1980)
ONEK900101	  sec_struct    Delta G values for the peptides extrapolated to 0 M urea (O'Neil-DeGrado, 1990)
ONEK900102	  sec_struct    Helix formation parameters (delta delta G) (O'Neil-DeGrado, 1990)
OOBM770101	  geometry      Average non-bonded energy per atom (Oobatake-Ooi, 1977)
OOBM770102	  geometry      Short and medium range non-bonded energy per atom (Oobatake-Ooi, 1977)
OOBM770103	  geometry      Long range non-bonded energy per atom (Oobatake-Ooi, 1977)
OOBM770104	  geometry      Average non-bonded energy per residue (Oobatake-Ooi, 1977)
OOBM770105	  geometry      Short and medium range non-bonded energy per residue (Oobatake-Ooi, 1977)
OOBM850101	  sec_struct    Optimized beta-structure-coil equilibrium constant (Oobatake et al., 1985)
OOBM850102	  sec_struct    Optimized propensity to form reverse turn (Oobatake et al., 1985)
OOBM850103	  sec_struct    Optimized transfer energy parameter (Oobatake et al., 1985)
OOBM850104	  sec_struct    Optimized average non-bonded energy per atom (Oobatake et al., 1985)
OOBM850105	  sec_struct    Optimized side chain interaction parameter (Oobatake et al., 1985)
PALJ810101	  sec_struct    Normalized frequency of alpha-helix from LG (Palau et al., 1981)
PALJ810102	  sec_struct    Normalized frequency of alpha-helix from CF (Palau et al., 1981)
PALJ810103	  sec_struct    Normalized frequency of beta-sheet from LG (Palau et al., 1981)
PALJ810104	  sec_struct    Normalized frequency of beta-sheet from CF (Palau et al., 1981)
PALJ810105	  sec_struct    Normalized frequency of turn from LG (Palau et al., 1981)
PALJ810106	  sec_struct    Normalized frequency of turn from CF (Palau et al., 1981)
PALJ810107	  sec_struct    Normalized frequency of alpha-helix in all-alpha class (Palau et al., 1981)
PALJ810108	  sec_struct    Normalized frequency of alpha-helix in alpha+beta class (Palau et al., 1981)
PALJ810109	  sec_struct    Normalized frequency of alpha-helix in alpha/beta class (Palau et al., 1981)
PALJ810110	  sec_struct    Normalized frequency of beta-sheet in all-beta class (Palau et al., 1981)
PALJ810111	  sec_struct    Normalized frequency of beta-sheet in alpha+beta class (Palau et al., 1981)
PALJ810112	  sec_struct    Normalized frequency of beta-sheet in alpha/beta class (Palau et al., 1981)
PALJ810113	  sec_struct    Normalized frequency of turn in all-alpha class (Palau et al., 1981)
PALJ810114	  sec_struct    Normalized frequency of turn in all-beta class (Palau et al., 1981)
PALJ810115	  sec_struct    Normalized frequency of turn in alpha+beta class (Palau et al., 1981)
PALJ810116	  sec_struct    Normalized frequency of turn in alpha/beta class (Palau et al., 1981)
PARJ860101	  observable    HPLC parameter (Parker et al., 1986)
PARS000101	  composition   p-Values of mesophilic proteins based on the distributions of B values (Parthasarathy-Murthy, 2000)
PARS000102	  composition   p-Values of thermophilic proteins based on the distributions of B values (Parthasarathy-Murthy, 2000)
PLIV810101	  hydrophobic   Partition coefficient (Pliska et al., 1981)
PONJ960101	  geometry      Average volumes of residues (Pontius et al., 1996)
PONP800101	  hydrophobic   Surrounding hydrophobicity in folded form (Ponnuswamy et al., 1980)
PONP800102	  hydrophobic   Average gain in surrounding hydrophobicity (Ponnuswamy et al., 1980)
PONP800103	  hydrophobic   Average gain ratio in surrounding hydrophobicity (Ponnuswamy et al., 1980)
PONP800104	  hydrophobic   Surrounding hydrophobicity in alpha-helix (Ponnuswamy et al., 1980)
PONP800105	  hydrophobic   Surrounding hydrophobicity in beta-sheet (Ponnuswamy et al., 1980)
PONP800106	  hydrophobic   Surrounding hydrophobicity in turn (Ponnuswamy et al., 1980)
PONP800107	  hydrophobic   Accessibility reduction ratio (Ponnuswamy et al., 1980)
PONP800108	  hydrophobic   Average number of surrounding residues (Ponnuswamy et al., 1980)
PONP930101	  hydrophobic   Hydrophobicity scales (Ponnuswamy, 1993)
PRAM820101	  hydrophobic   Intercept in regression analysis (Prabhakaran-Ponnuswamy, 1982)
PRAM820102	  hydrophobic   Slope in regression analysis x 1.0E1 (Prabhakaran-Ponnuswamy, 1982)
PRAM820103	  hydrophobic   Correlation coefficient in regression analysis (Prabhakaran-Ponnuswamy, 1982)
PRAM900101	  hydrophobic   Hydrophobicity (Prabhakaran, 1990)
PRAM900102	  sec_struct    Relative frequency in alpha-helix (Prabhakaran, 1990)
PRAM900103	  sec_struct    Relative frequency in beta-sheet (Prabhakaran, 1990)
PRAM900104	  sec_struct    Relative frequency in reverse-turn (Prabhakaran, 1990)
PTIO830101	  sec_struct    Helix-coil equilibrium constant (Ptitsyn-Finkelstein, 1983)
PTIO830102	  sec_struct    Beta-coil equilibrium constant (Ptitsyn-Finkelstein, 1983)
PUNT030101	  composition   Knowledge-based membrane-propensity scale from 1D_Helix in MPtopo databases (Punta-Maritan, 2003)
PUNT030102	  composition   Knowledge-based membrane-propensity scale from 3D_Helix in MPtopo databases (Punta-Maritan, 2003)
QIAN880101	  sec_struct    Weights for alpha-helix at the window position of -6 (Qian-Sejnowski, 1988)
QIAN880102	  sec_struct    Weights for alpha-helix at the window position of -5 (Qian-Sejnowski, 1988)
QIAN880103	  sec_struct    Weights for alpha-helix at the window position of -4 (Qian-Sejnowski, 1988)
QIAN880104	  sec_struct    Weights for alpha-helix at the window position of -3 (Qian-Sejnowski, 1988)
QIAN880105	  sec_struct    Weights for alpha-helix at the window position of -2 (Qian-Sejnowski, 1988)
QIAN880106	  sec_struct    Weights for alpha-helix at the window position of -1 (Qian-Sejnowski, 1988)
QIAN880107	  sec_struct    Weights for alpha-helix at the window position of 0 (Qian-Sejnowski, 1988)
QIAN880108	  sec_struct    Weights for alpha-helix at the window position of 1 (Qian-Sejnowski, 1988)
QIAN880109	  sec_struct    Weights for alpha-helix at the window position of 2 (Qian-Sejnowski, 1988)
QIAN880110	  sec_struct    Weights for alpha-helix at the window position of 3 (Qian-Sejnowski, 1988)
QIAN880111	  sec_struct    Weights for alpha-helix at the window position of 4 (Qian-Sejnowski, 1988)
QIAN880112	  sec_struct    Weights for alpha-helix at the window position of 5 (Qian-Sejnowski, 1988)
QIAN880113	  sec_struct    Weights for alpha-helix at the window position of 6 (Qian-Sejnowski, 1988)
QIAN880114	  sec_struct    Weights for beta-sheet at the window position of -6 (Qian-Sejnowski, 1988)
QIAN880115	  sec_struct    Weights for beta-sheet at the window position of -5 (Qian-Sejnowski, 1988)
QIAN880116	  sec_struct    Weights for beta-sheet at the window position of -4 (Qian-Sejnowski, 1988)
QIAN880117	  sec_struct    Weights for beta-sheet at the window position of -3 (Qian-Sejnowski, 1988)
QIAN880118	  sec_struct    Weights for beta-sheet at the window position of -2 (Qian-Sejnowski, 1988)
QIAN880119	  sec_struct    Weights for beta-sheet at the window position of -1 (Qian-Sejnowski, 1988)
QIAN880120	  sec_struct    Weights for beta-sheet at the window position of 0 (Qian-Sejnowski, 1988)
QIAN880121	  sec_struct    Weights for beta-sheet at the window position of 1 (Qian-Sejnowski, 1988)
QIAN880122	  sec_struct    Weights for beta-sheet at the window position of 2 (Qian-Sejnowski, 1988)
QIAN880123	  sec_struct    Weights for beta-sheet at the window position of 3 (Qian-Sejnowski, 1988)
QIAN880124	  sec_struct    Weights for beta-sheet at the window position of 4 (Qian-Sejnowski, 1988)
QIAN880125	  sec_struct    Weights for beta-sheet at the window position of 5 (Qian-Sejnowski, 1988)
QIAN880126	  sec_struct    Weights for beta-sheet at the window position of 6 (Qian-Sejnowski, 1988)
QIAN880127	  sec_struct    Weights for coil at the window position of -6 (Qian-Sejnowski, 1988)
QIAN880128	  sec_struct    Weights for coil at the window position of -5 (Qian-Sejnowski, 1988)
QIAN880129	  sec_struct    Weights for coil at the window position of -4 (Qian-Sejnowski, 1988)
QIAN880130	  sec_struct    Weights for coil at the window position of -3 (Qian-Sejnowski, 1988)
QIAN880131	  sec_struct    Weights for coil at the window position of -2 (Qian-Sejnowski, 1988)
QIAN880132	  sec_struct    Weights for coil at the window position of -1 (Qian-Sejnowski, 1988)
QIAN880133	  sec_struct    Weights for coil at the window position of 0 (Qian-Sejnowski, 1988)
QIAN880134	  sec_struct    Weights for coil at the window position of 1 (Qian-Sejnowski, 1988)
QIAN880135	  sec_struct    Weights for coil at the window position of 2 (Qian-Sejnowski, 1988)
QIAN880136	  sec_struct    Weights for coil at the window position of 3 (Qian-Sejnowski, 1988)
QIAN880137	  sec_struct    Weights for coil at the window position of 4 (Qian-Sejnowski, 1988)
QIAN880138	  sec_struct    Weights for coil at the window position of 5 (Qian-Sejnowski, 1988)
QIAN880139	  sec_struct    Weights for coil at the window position of 6 (Qian-Sejnowski, 1988)
RACS770101	  geometry      Average reduced distance for C-alpha (Rackovsky-Scheraga, 1977)
RACS770102	  geometry      Average reduced distance for side chain (Rackovsky-Scheraga, 1977)
RACS770103	  geometry      Side chain orientational preference (Rackovsky-Scheraga, 1977)
RACS820101	  geometry      Average relative fractional occurrence in A0(i) (Rackovsky-Scheraga, 1982)
RACS820102	  geometry      Average relative fractional occurrence in AR(i) (Rackovsky-Scheraga, 1982)
RACS820103	  geometry      Average relative fractional occurrence in AL(i) (Rackovsky-Scheraga, 1982)
RACS820104	  geometry      Average relative fractional occurrence in EL(i) (Rackovsky-Scheraga, 1982)
RACS820105	  geometry      Average relative fractional occurrence in E0(i) (Rackovsky-Scheraga, 1982)
RACS820106	  geometry      Average relative fractional occurrence in ER(i) (Rackovsky-Scheraga, 1982)
RACS820107	  geometry      Average relative fractional occurrence in A0(i-1) (Rackovsky-Scheraga, 1982)
RACS820108	  geometry      Average relative fractional occurrence in AR(i-1) (Rackovsky-Scheraga, 1982)
RACS820109	  geometry      Average relative fractional occurrence in AL(i-1) (Rackovsky-Scheraga, 1982)
RACS820110	  geometry      Average relative fractional occurrence in EL(i-1) (Rackovsky-Scheraga, 1982)
RACS820111	  geometry      Average relative fractional occurrence in E0(i-1) (Rackovsky-Scheraga, 1982)
RACS820112	  geometry      Average relative fractional occurrence in ER(i-1) (Rackovsky-Scheraga, 1982)
RACS820113	  geometry      Value of theta(i) (Rackovsky-Scheraga, 1982)
RACS820114	  geometry      Value of theta(i-1) (Rackovsky-Scheraga, 1982)
RADA880101	  hydrophobic   Transfer free energy from chx to wat (Radzicka-Wolfenden, 1988)
RADA880102	  hydrophobic   Transfer free energy from oct to wat (Radzicka-Wolfenden, 1988)
RADA880103	  hydrophobic   Transfer free energy from vap to chx (Radzicka-Wolfenden, 1988)
RADA880104	  hydrophobic   Transfer free energy from chx to oct (Radzicka-Wolfenden, 1988)
RADA880105	  hydrophobic   Transfer free energy from vap to oct (Radzicka-Wolfenden, 1988)
RADA880106	  hydrophobic   Accessible surface area (Radzicka-Wolfenden, 1988)
RADA880107	  hydrophobic   Energy transfer from out to in(95%buried) (Radzicka-Wolfenden, 1988)
RADA880108	  polar         Mean polarity (Radzicka-Wolfenden, 1988)
RICJ880101	  sec_struct    Relative preference value at N' (Richardson-Richardson, 1988)
RICJ880102	  sec_struct    Relative preference value at N' (Richardson-Richardson, 1988)
RICJ880103	  sec_struct    Relative preference value at N-cap (Richardson-Richardson, 1988)
RICJ880104	  sec_struct    Relative preference value at N1 (Richardson-Richardson, 1988)
RICJ880105	  sec_struct    Relative preference value at N2 (Richardson-Richardson, 1988)
RICJ880106	  sec_struct    Relative preference value at N3 (Richardson-Richardson, 1988)
RICJ880107	  sec_struct    Relative preference value at N4 (Richardson-Richardson, 1988)
RICJ880108	  sec_struct    Relative preference value at N5 (Richardson-Richardson, 1988)
RICJ880109	  sec_struct    Relative preference value at Mid (Richardson-Richardson, 1988)
RICJ880110	  sec_struct    Relative preference value at C5 (Richardson-Richardson, 1988)
RICJ880111	  sec_struct    Relative preference value at C4 (Richardson-Richardson, 1988)
RICJ880112	  sec_struct    Relative preference value at C3 (Richardson-Richardson, 1988)
RICJ880113	  sec_struct    Relative preference value at C2 (Richardson-Richardson, 1988)
RICJ880114	  sec_struct    Relative preference value at C1 (Richardson-Richardson, 1988)
RICJ880115	  sec_struct    Relative preference value at C-cap (Richardson-Richardson, 1988)
RICJ880116	  sec_struct    Relative preference value at C' (Richardson-Richardson, 1988)
RICJ880117	  sec_struct    Relative preference value at C' (Richardson-Richardson, 1988)
ROBB760101	  sec_struct    Information measure for alpha-helix (Robson-Suzuki, 1976)
ROBB760102	  sec_struct    Information measure for N-terminal helix (Robson-Suzuki, 1976)
ROBB760103	  sec_struct    Information measure for middle helix (Robson-Suzuki, 1976)
ROBB760104	  sec_struct    Information measure for C-terminal helix (Robson-Suzuki, 1976)
ROBB760105	  sec_struct    Information measure for extended (Robson-Suzuki, 1976)
ROBB760106	  sec_struct    Information measure for pleated-sheet (Robson-Suzuki, 1976)
ROBB760107	  sec_struct    Information measure for extended without H-bond (Robson-Suzuki, 1976)
ROBB760108	  sec_struct    Information measure for turn (Robson-Suzuki, 1976)
ROBB760109	  sec_struct    Information measure for N-terminal turn (Robson-Suzuki, 1976)
ROBB760110	  sec_struct    Information measure for middle turn (Robson-Suzuki, 1976)
ROBB760111	  sec_struct    Information measure for C-terminal turn (Robson-Suzuki, 1976)
ROBB760112	  sec_struct    Information measure for coil (Robson-Suzuki, 1976)
ROBB760113	  sec_struct    Information measure for loop (Robson-Suzuki, 1976)
ROBB790101	  hydrophobic   Hydration free energy (Robson-Osguthorpe, 1979)
ROSG850101	  hydrophobic   Mean area buried on transfer (Rose et al., 1985)
ROSG850102	  hydrophobic   Mean fractional area loss (Rose et al., 1985)
ROSM880101	  hydrophobic   Side chain hydropathy, uncorrected for solvation (Roseman, 1988)
ROSM880102	  hydrophobic   Side chain hydropathy, corrected for solvation (Roseman, 1988)
ROSM880103	  hydrophobic   Loss of Side chain hydropathy by helix formation (Roseman, 1988)
ROSM880104	  hydrophobic   Hydropathies of amino acid side chains, neutral form (Roseman, 1988)
ROSM880105	  hydrophobic   Hydropathies of amino acid side chains, pi-values in pH 7.0 (Roseman, 1988)
SIMZ760101	  hydrophobic   Transfer free energy (Simon, 1976), Cited by Charton-Charton (1982)
SNEP660101	  meta          Principal component I (Sneath, 1966)
SNEP660102	  meta          Principal component II (Sneath, 1966)
SNEP660103	  meta          Principal component III (Sneath, 1966)
SNEP660104	  meta          Principal component IV (Sneath, 1966)
SUEM840101	  observable    Zimm-Bragg parameter s at 20 C (Sueki et al., 1984)
SUEM840102	  observable    Zimm-Bragg parameter sigma x 1.0E4 (Sueki et al., 1984)
SUYM030101	  flexibility   Linker propensity index (Suyama-Ohara, 2003)
SWER830101	  hydrophobic   Optimal matching hydrophobicity (Sweet-Eisenberg, 1983)
TAKK010101	  observable    Side-chain contribution to protein stability (kJ/mol) (Takano-Yutani, 2001)
TANS770101	  sec_struct    Normalized frequency of alpha-helix (Tanaka-Scheraga, 1977)
TANS770102	  sec_struct    Normalized frequency of isolated helix (Tanaka-Scheraga, 1977)
TANS770103	  sec_struct    Normalized frequency of extended structure (Tanaka-Scheraga, 1977)
TANS770104	  sec_struct    Normalized frequency of chain reversal R (Tanaka-Scheraga, 1977)
TANS770105	  sec_struct    Normalized frequency of chain reversal S (Tanaka-Scheraga, 1977)
TANS770106	  sec_struct    Normalized frequency of chain reversal D (Tanaka-Scheraga, 1977)
TANS770107	  sec_struct    Normalized frequency of left-handed helix (Tanaka-Scheraga, 1977)
TANS770108	  sec_struct    Normalized frequency of zeta R (Tanaka-Scheraga, 1977)
TANS770109	  sec_struct    Normalized frequency of coil (Tanaka-Scheraga, 1977)
TANS770110	  sec_struct    Normalized frequency of chain reversal (Tanaka-Scheraga, 1977)
TSAJ990101	  geometry      Volumes including the crystallographic waters using the ProtOr (Tsai et al., 1999)
TSAJ990102	  geometry      Volumes not including the crystallographic waters using the ProtOr (Tsai et al., 1999)
VASM830101	  meta          Relative population of conformational state A (Vasquez et al., 1983)
VASM830102	  meta          Relative population of conformational state C (Vasquez et al., 1983)
VASM830103	  meta          Relative population of conformational state E (Vasquez et al., 1983)
VELV850101	  polar         Electron-ion interaction potential (Veljkovic et al., 1985)
VENT840101	  observable    Bitterness (Venanzi, 1984)
VHEG790101	  hydrophobic   Transfer free energy to lipophilic phase (von Heijne-Blomberg, 1979)
VINM940101	  flexibility   Normalized flexibility parameters (B-values), average (Vihinen et al., 1994)
VINM940102	  flexibility   Normalized flexibility parameters (B-values) for each residue surrounded by none rigid neighbours (Vihinen et al., 1994)
VINM940103	  flexibility   Normalized flexibility parameters (B-values) for each residue surrounded by one rigid neighbours (Vihinen et al., 1994)
VINM940104	  flexibility   Normalized flexibility parameters (B-values) for each residue surrounded by two rigid neighbours (Vihinen et al., 1994)
WARP780101	  geometry      Average interactions per side chain atom (Warme-Morgan, 1978)
WEBA780101	  observable    RF value in high salt chromatography (Weber-Lacey, 1978)
WERD780101	  hydrophobic   Propensity to be buried inside (Wertz-Scheraga, 1978)
WERD780102	  hydrophobic   Free energy change of epsilon(i) to epsilon(ex) (Wertz-Scheraga, 1978)
WERD780103	  hydrophobic   Free energy change of alpha(Ri) to alpha(Rh) (Wertz-Scheraga, 1978)
WERD780104	  hydrophobic   Free energy change of epsilon(i) to alpha(Rh) (Wertz-Scheraga, 1978)
WILM950101	  hydrophobic   Hydrophobicity coefficient in RP-HPLC, C18 with 0.1%TFA/MeCN/H2O (Wilce et al. 1995)
WILM950102	  hydrophobic   Hydrophobicity coefficient in RP-HPLC, C8 with 0.1%TFA/MeCN/H2O (Wilce et al. 1995)
WILM950103	  hydrophobic   Hydrophobicity coefficient in RP-HPLC, C4 with 0.1%TFA/MeCN/H2O (Wilce et al. 1995)
WILM950104	  hydrophobic   Hydrophobicity coefficient in RP-HPLC, C18 with 0.1%TFA/2-PrOH/MeCN/H2O (Wilce et al. 1995)
WIMW960101	  hydrophobic   Free energies of transfer of AcWl-X-LL peptides from bilayer interface to water (Wimley-White, 1996)
WOEC730101	  polar         Polar requirement (Woese, 1973)
WOLR790101	  hydrophobic   Hydrophobicity index (Wolfenden et al., 1979)
WOLR810101	  hydrophobic   Hydration potential (Wolfenden et al., 1981)
WOLS870101	  meta          Principal property value z1 (Wold et al., 1987)
WOLS870102	  meta          Principal property value z2 (Wold et al., 1987)
WOLS870103	  meta          Principal property value z3 (Wold et al., 1987)
YANJ020101	  geometry      Side-chain conformation by gaussian evolutionary method (Yang et al., 2002)
YUTK870101	  observable    Unfolding Gibbs energy in water, pH7.0 (Yutani et al., 1987)
YUTK870102	  observable    Unfolding Gibbs energy in water, pH9.0 (Yutani et al., 1987)
YUTK870103	  observable    Activation Gibbs energy of unfolding, pH7.0 (Yutani et al., 1987)
YUTK870104	  observable    Activation Gibbs energy of unfolding, pH9.0 (Yutani et al., 1987)
ZASB820101	  hydrophobic   Dependence of partition coefficient on ionic strength (Zaslavsky et al., 1982)
ZHOH040101	  observable    The stability scale from the knowledge-based atom-atom potential (Zhou-Zhou, 2004)
ZHOH040102	  observable    The relative stability scale extracted from mutation experiments (Zhou-Zhou, 2004)
ZHOH040103	  hydrophobic   Buriability (Zhou-Zhou, 2004)
ZIMJ680101	  hydrophobic   Hydrophobicity (Zimmerman et al., 1968)
ZIMJ680102	  geometry      Bulkiness (Zimmerman et al., 1968)
ZIMJ680103	  polar         Polarity (Zimmerman et al., 1968)
ZIMJ680104	  polar         Isoelectric point (Zimmerman et al., 1968)
ZIMJ680105	  composition   RF rank (Zimmerman et al., 1968)
