Contacts of the helix formed by residues 321 - 345 (chain B) in PDB entry 3WOO


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with TYR 321 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307B  VAL*     3.6    31.4    -      -       +      -
    317B  ILE*     2.8    23.3    +      -       +      +
    318B  GLN      4.1     1.8    -      -       -      +
    320B  LYS*     1.3    79.5    -      -       +      +
    322B  ALA*     1.3    58.9    +      -       -      +
    323B  ALA      3.4     2.2    -      -       -      -
    324B  THR*     3.4    23.2    +      -       +      -
    325B  MET*     2.9    30.9    +      -       -      +
    403B  ALA*     5.7     0.3    -      -       -      +
    447B  ARG      3.8    14.5    +      -       -      -
    448B  TYR*     3.4    10.2    -      -       -      -
    449B  VAL*     3.1    44.3    +      -       +      -
    452B  MET*     3.7    31.4    -      -       +      +
    453B  ASP*     3.8    11.2    +      -       -      +
    456B  LEU*     4.3    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 322 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  TYR*     3.6    25.9    +      -       -      +
     93B  GLN*     4.1     0.9    -      -       +      -
    103B  ILE*     3.9    17.0    -      -       +      -
    318B  GLN      3.4    12.8    +      -       -      +
    319B  VAL*     3.3    17.0    +      -       -      +
    320B  LYS      3.4     0.4    -      -       -      -
    321B  TYR*     1.3    77.7    -      -       -      +
    323B  ALA*     1.3    59.3    +      -       -      +
    325B  MET*     3.4     7.6    -      -       -      +
    326B  ALA*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 323 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  TYR*     3.8    23.5    -      -       +      -
     90B  GLY*     4.6     5.2    -      -       -      -
     93B  GLN*     4.0    24.2    -      -       +      +
    320B  LYS      5.1     0.4    +      -       -      -
    321B  TYR      3.4     0.4    -      -       -      -
    322B  ALA*     1.3    76.5    -      -       -      +
    324B  THR*     1.3    66.6    +      -       -      +
    326B  ALA*     3.2     3.7    +      -       -      +
    327B  GLY*     3.1    19.1    +      -       -      -
    447B  ARG*     4.5    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 324 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320B  LYS      5.2     1.8    +      -       -      -
    321B  TYR*     3.4    23.9    +      -       +      -
    323B  ALA*     1.3    76.7    -      -       -      +
    325B  MET*     1.3    58.3    +      -       -      +
    327B  GLY*     3.4     2.2    +      -       -      -
    328B  TRP*     3.0    68.4    +      -       +      +
    447B  ARG*     5.2    12.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 325 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  ILE*     3.3    36.3    -      -       +      +
    307B  VAL*     3.5    28.7    -      -       +      -
    308B  GLU*     3.5    31.0    -      -       +      +
    321B  TYR      2.9    16.2    +      -       -      +
    322B  ALA*     3.4     9.9    -      -       -      +
    323B  ALA      3.2     0.2    -      -       -      -
    324B  THR*     1.3    77.8    -      -       -      +
    326B  ALA*     1.3    61.2    +      -       -      +
    328B  TRP*     3.4    19.8    +      -       -      +
    329B  ASN*     3.0    39.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 326 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  TYR*     4.3    18.8    -      -       +      +
    208B  LYS*     3.7    26.7    +      -       -      +
    212B  ASP*     5.0     1.4    -      -       -      +
    322B  ALA      3.0    15.3    +      -       -      +
    323B  ALA*     3.2     8.5    +      -       -      +
    325B  MET*     1.3    77.0    -      -       -      +
    327B  GLY*     1.3    56.5    +      -       -      +
    329B  ASN*     3.5     4.3    +      -       -      +
    330B  ASN*     2.9    33.0    +      -       -      +
      3D  ILE*     5.3     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 327 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300B  TYR*     5.3     1.1    -      -       -      -
    323B  ALA      3.1    12.5    +      -       -      -
    324B  THR*     3.8     2.9    -      -       -      -
    326B  ALA*     1.3    73.6    -      -       -      +
    328B  TRP*     1.3    65.7    +      -       -      +
    330B  ASN*     3.8     3.8    -      -       -      +
    331B  THR*     2.9    31.0    +      -       -      -
      3D  ILE*     4.9    10.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 328 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300B  TYR*     3.7    46.7    -      +       +      +
    303B  GLN*     3.6    39.9    +      -       +      -
    304B  ILE*     3.6    23.9    -      -       +      +
    307B  VAL*     3.6    24.2    -      -       +      -
    321B  TYR*     5.2     1.8    -      +       -      -
    324B  THR*     3.0    44.9    +      -       +      +
    325B  MET*     3.4    23.3    +      -       -      +
    327B  GLY*     1.3    76.0    -      -       -      +
    329B  ASN*     1.3    54.9    +      -       -      +
    332B  SER*     2.7    36.3    +      -       -      -
    456B  LEU*     4.1    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 329 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  ASP*     3.3    42.9    +      -       +      +
    304B  ILE*     3.8    32.3    -      -       -      +
    308B  GLU*     5.7     1.0    +      -       -      -
    325B  MET*     3.0    34.9    +      -       -      +
    326B  ALA*     3.8     3.6    -      -       -      +
    328B  TRP*     1.3    77.9    -      -       -      +
    330B  ASN*     1.3    62.9    +      -       -      +
    332B  SER*     3.2     6.7    +      -       -      -
    333B  LYS*     3.0    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 330 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  ASP*     4.7     0.6    +      -       -      +
    215B  ASN*     2.9    22.5    +      -       -      +
    216B  TRP*     3.1    17.8    +      -       -      -
    326B  ALA      2.9    21.0    +      -       -      +
    327B  GLY*     3.8     4.7    -      -       -      +
    329B  ASN*     1.3    77.9    -      -       -      +
    331B  THR*     1.3    62.6    +      -       -      +
    334B  ASN*     2.9    25.6    +      -       -      +
      1D  VAL*     2.8    56.9    +      -       +      +
      3D  ILE*     3.5    22.8    +      -       +      +
      5D  PRO      4.7     4.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 331 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296B  ILE*     4.7     0.2    -      -       +      -
    300B  TYR*     3.9    22.7    -      -       +      -
    327B  GLY*     2.9    17.5    +      -       -      -
    330B  ASN*     1.3    77.9    +      -       -      +
    332B  SER*     1.3    67.4    +      -       -      +
    334B  ASN*     3.2     6.6    +      -       +      +
    335B  TYR*     3.0    59.0    +      -       +      +
      5D  PRO*     3.4    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 332 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297B  ALA*     4.1    24.6    -      -       -      +
    300B  TYR*     4.0    18.3    -      -       -      -
    301B  LYS*     4.2    12.2    -      -       -      +
    304B  ILE*     3.9     8.1    -      -       -      +
    328B  TRP      2.7    23.3    +      -       -      -
    329B  ASN*     3.2    12.1    +      -       -      -
    331B  THR*     1.3    81.5    -      -       -      +
    333B  LYS*     1.3    55.1    +      -       -      +
    335B  TYR*     3.3     2.5    +      -       -      +
    336B  ASP*     2.9    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 333 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  ASP*     3.0    28.6    +      -       +      +
    213B  ILE*     3.0    17.6    +      -       -      +
    215B  ASN*     2.8    33.0    +      -       +      +
    216B  TRP*     3.8    14.8    -      -       +      -
    217B  MET*     3.8     8.0    -      -       -      +
    329B  ASN      3.0    19.5    +      -       -      +
    332B  SER*     1.3    76.7    +      -       -      +
    334B  ASN*     1.3    63.3    +      -       -      +
    336B  ASP*     3.3     9.9    +      -       +      +
    337B  GLY      2.9    18.9    +      -       -      -
    677B  TRP*     3.7    28.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 334 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216B  TRP*     3.3    40.2    -      -       +      +
    330B  ASN*     2.9    19.3    +      -       -      +
    331B  THR*     3.2     7.6    +      -       -      +
    333B  LYS*     1.3    77.2    -      -       -      +
    335B  TYR*     1.3    69.2    +      -       -      +
    337B  GLY*     3.1     4.1    +      -       -      -
    338B  GLN*     2.8    50.9    +      -       -      +
    677B  TRP*     5.7     0.2    -      -       -      -
    680B  VAL*     3.6    16.7    -      -       -      +
      2D  TYR*     5.0     2.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 335 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292B  THR*     5.9     0.3    -      -       -      +
    293B  TYR*     3.4    69.0    -      +       +      +
    296B  ILE*     3.6    32.4    -      -       +      +
    297B  ALA*     4.3     7.2    -      -       +      -
    331B  THR*     3.0    43.5    +      -       +      +
    332B  SER      3.7     4.0    -      -       -      +
    334B  ASN*     1.3    88.3    -      -       -      +
    336B  ASP*     1.3    64.4    +      -       -      +
    337B  GLY      3.1     0.9    -      -       -      -
    338B  GLN*     3.1     6.5    +      -       -      +
    339B  LEU*     3.0    30.3    +      -       -      +
      5D  PRO*     5.3     6.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 336 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297B  ALA*     4.1     8.1    -      -       -      +
    301B  LYS*     2.7    38.5    +      -       -      -
    332B  SER      2.9    16.9    +      -       -      +
    333B  LYS*     3.6    14.5    -      -       +      +
    335B  TYR*     1.3    73.3    -      -       -      +
    337B  GLY*     1.3    57.7    +      -       -      +
    339B  LEU*     3.5    11.6    +      -       -      +
    340B  GLU*     3.2    26.7    +      -       -      +
    677B  TRP*     4.0    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 337 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333B  LYS      2.9    11.4    +      -       -      -
    334B  ASN*     3.1     4.9    +      -       -      -
    336B  ASP*     1.3    75.0    -      -       -      +
    338B  GLN*     1.3    58.3    +      -       -      +
    340B  GLU*     3.8     1.9    -      -       -      +
    341B  GLY*     2.8    26.0    +      -       -      -
    677B  TRP*     3.4    33.3    +      -       -      +
    680B  VAL*     3.3    16.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 338 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293B  TYR*     3.4    27.8    +      -       +      -
    334B  ASN*     2.8    40.8    +      -       -      +
    335B  TYR*     3.1     7.2    +      -       -      +
    337B  GLY*     1.3    70.3    -      -       -      +
    339B  LEU*     1.3    60.1    +      -       -      +
    341B  GLY      3.3     0.3    +      -       -      -
    342B  PHE*     2.8    46.9    +      -       +      -
    680B  VAL*     3.5    27.8    +      -       +      +
    681B  SER*     4.0     5.8    -      -       -      +
    683B  ASN*     3.5    16.2    +      -       -      +
    684B  TRP*     3.1    33.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 339 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  ALA*     3.6    23.8    -      -       +      +
    293B  TYR*     3.8    30.1    -      -       +      +
    294B  PRO*     4.0    26.9    -      -       +      -
    297B  ALA*     6.0     0.7    -      -       +      -
    335B  TYR      3.0    20.9    +      -       -      +
    336B  ASP*     3.7    11.9    -      -       -      +
    338B  GLN*     1.3    76.4    -      -       -      +
    340B  GLU*     1.3    64.4    +      -       -      +
    342B  PHE*     3.1    28.0    +      -       +      +
    343B  LYS*     3.3    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 340 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    336B  ASP      3.2    13.9    +      -       -      +
    337B  GLY      3.8     3.8    -      -       -      +
    339B  LEU*     1.3    78.2    -      -       -      +
    341B  GLY*     1.3    57.0    +      -       -      +
    343B  LYS*     3.3    15.0    +      -       +      +
    344B  ARG*     3.0    26.4    +      -       +      +
    677B  TRP*     3.0    39.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 341 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337B  GLY      2.8    20.0    +      -       -      -
    338B  GLN      3.3     0.4    +      -       -      -
    340B  GLU*     1.3    71.5    -      -       -      +
    342B  PHE*     1.3    65.3    +      -       -      +
    344B  ARG*     3.2    14.9    +      -       -      +
    345B  ILE*     3.1    28.6    +      -       -      +
    678B  GLU*     5.4     5.2    -      -       -      -
    681B  SER*     3.6    21.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 342 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285B  PHE*     3.5    37.5    -      +       +      -
    288B  THR*     5.5     0.2    -      -       +      -
    289B  ALA*     3.8    19.5    -      -       +      -
    293B  TYR*     4.1     7.6    -      +       -      -
    338B  GLN*     2.8    41.0    +      -       +      -
    339B  LEU*     3.1    24.6    +      -       +      +
    341B  GLY*     1.3    73.7    -      -       -      +
    343B  LYS*     1.3    52.7    +      -       +      +
    345B  ILE*     4.5     0.4    -      -       +      -
    346B  ASP*     2.8    16.3    +      -       -      -
    347B  ALA*     2.8    41.7    +      -       +      +
    348B  ALA*     5.4     0.7    -      -       +      +
    681B  SER*     3.7    19.3    -      -       -      -
    684B  TRP*     3.4    39.0    -      +       +      -
----------------------------------------------------------
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Residues in contact with LYS 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339B  LEU*     3.3    19.4    +      -       -      +
    340B  GLU*     3.5    13.5    -      -       +      +
    341B  GLY      3.3     0.6    -      -       -      -
    342B  PHE*     1.3    74.3    -      -       +      +
    344B  ARG*     1.3    66.7    +      -       -      +
    345B  ILE      3.4     0.5    +      -       -      -
    346B  ASP*     3.5     9.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340B  GLU*     3.0    16.3    +      -       +      +
    341B  GLY*     3.2    11.7    +      -       -      +
    343B  LYS*     1.3    77.8    -      -       -      +
    345B  ILE*     1.3    79.1    +      -       -      +
    346B  ASP      3.7     0.3    +      -       -      -
    591B  PRO      6.2     0.2    -      -       -      -
    678B  GLU*     3.2    43.2    +      -       -      +
    681B  SER*     4.1     7.3    +      -       -      -
    682B  SER*     5.9     0.2    +      -       -      -
    687B  ASP*     2.7    36.0    +      -       -      +
    690B  MET*     3.1    24.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341B  GLY      3.1    13.7    +      -       -      +
    342B  PHE      3.8     0.2    -      -       -      +
    344B  ARG*     1.3   116.8    -      -       -      +
    346B  ASP*     1.3    64.1    +      -       -      +
    347B  ALA*     3.7    15.3    -      -       +      +
    350B  GLN*     2.4    32.3    -      -       -      +
    353B  ARG*     5.6     0.2    +      -       -      -
    681B  SER*     4.7     9.0    -      -       -      +
    685B  VAL*     3.7    44.6    -      -       +      +
    687B  ASP*     3.9    12.8    -      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il