Contacts of the helix formed by residues 332 - 356 (chain B) in PDB entry 5ZF6


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 ASP 332 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  GLN*     5.4     1.9    +      -       -      -
    277B  PHE*     5.7     7.0    -      -       -      -
    330B  GLU      3.9     1.4    +      -       -      -
    331B  ALA*     1.3    74.2    -      -       -      +
    333B  PRO*     1.3    78.0    -      -       -      +
    334B  TYR*     2.6    39.3    +      -       -      +
    335B  GLU*     3.1    33.5    +      -       +      +
    336B  ILE*     3.3    12.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 333 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325B  LYS*     4.5    20.1    +      -       -      +
    331B  ALA      3.5     5.8    -      -       -      +
    332B  ASP*     1.3    91.6    -      -       -      +
    334B  TYR*     1.3    60.3    +      -       -      +
    336B  ILE*     3.5    17.4    +      -       +      +
    337B  ILE*     3.6    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 334 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  GLN*     3.1    50.6    +      -       +      +
    147B  PHE*     3.2    43.1    -      +       -      -
    277B  PHE*     4.4    18.2    +      +       +      -
    332B  ASP*     2.6    22.0    +      -       -      +
    333B  PRO*     1.3    70.4    -      -       +      +
    335B  GLU*     1.3    67.5    +      -       -      +
    336B  ILE      3.1     1.8    -      -       -      -
    337B  ILE*     3.0    25.8    +      -       +      +
    338B  GLU*     3.1    38.8    +      -       +      +
    341B  ASN*     5.9     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 335 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    275B  LYS*     5.7     4.5    +      -       -      -
    278B  THR      4.8     1.5    -      -       -      +
    279B  PRO*     4.3    16.7    -      -       +      +
    280B  SER*     3.3    27.4    +      -       -      -
    283B  ILE*     3.4    29.8    -      -       +      +
    331B  ALA*     4.0     3.5    -      -       -      -
    332B  ASP*     3.1    36.3    +      -       +      +
    334B  TYR*     1.3    84.3    -      -       +      +
    336B  ILE*     1.3    56.8    +      -       -      +
    338B  GLU*     4.1     3.5    -      -       -      +
    339B  SER*     3.1    32.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 336 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283B  ILE*     4.5    11.7    -      -       +      -
    321B  GLU*     3.5    37.7    -      -       +      +
    324B  LEU*     3.7    38.4    -      -       +      +
    325B  LYS*     4.6    16.6    -      -       -      +
    328B  PHE*     4.6     2.7    -      -       +      +
    331B  ALA*     3.7    24.9    -      -       +      +
    332B  ASP      3.3    16.4    -      -       -      +
    333B  PRO*     3.7    11.4    -      -       +      +
    334B  TYR      3.1     1.0    -      -       -      -
    335B  GLU*     1.3    76.5    -      -       -      +
    337B  ILE*     1.3    63.2    +      -       -      +
    339B  SER*     3.6     5.5    +      -       -      -
    340B  PHE*     3.4    19.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 337 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317B  ARG*     4.8    12.7    -      -       -      +
    321B  GLU*     3.1    33.2    -      -       -      +
    333B  PRO      3.6    11.9    +      -       -      +
    334B  TYR*     3.0    20.4    +      -       +      +
    336B  ILE*     1.3    74.5    -      -       -      +
    338B  GLU*     1.3    66.2    +      -       -      +
    340B  PHE*     3.2     7.3    +      -       -      +
    341B  ASN*     3.0    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 338 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  PHE*     6.0     0.9    -      -       -      -
    277B  PHE      5.4     3.4    -      -       -      +
    279B  PRO*     3.6    29.5    -      -       +      +
    334B  TYR*     3.1    41.8    +      -       +      +
    335B  GLU*     4.4     3.8    -      -       -      +
    337B  ILE*     1.3    74.9    -      -       -      +
    339B  SER*     1.3    55.9    +      -       -      +
    341B  ASN*     2.9    22.4    +      -       -      +
    342B  VAL*     2.6    48.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 339 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279B  PRO*     3.3    22.9    -      -       -      +
    283B  ILE*     3.2    25.9    -      -       -      +
    284B  VAL*     3.9     5.7    -      -       -      +
    287B  THR*     3.7    20.2    -      -       -      -
    324B  LEU*     5.0     0.7    -      -       -      -
    335B  GLU*     3.1    22.0    +      -       -      +
    336B  ILE      3.7     6.1    -      -       -      -
    337B  ILE      3.2     0.4    -      -       -      -
    338B  GLU*     1.3    76.7    -      -       -      +
    340B  PHE*     1.3    61.1    +      -       -      +
    342B  VAL*     3.4     3.4    +      -       -      +
    343B  VAL*     3.1    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 340 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    287B  THR*     3.8    19.4    -      -       +      +
    291B  ALA*     4.0    18.8    -      -       +      -
    295B  LEU*     3.9    22.4    -      -       +      -
    313B  VAL*     3.4    24.9    -      -       +      -
    316B  ILE*     4.0     5.6    -      -       +      -
    317B  ARG*     3.5    52.5    -      -       +      -
    320B  THR*     3.7    18.8    -      -       -      -
    321B  GLU*     4.6    10.5    -      -       +      +
    336B  ILE      3.4     8.5    +      -       -      +
    337B  ILE      3.2     9.2    +      -       -      +
    339B  SER*     1.3    75.6    -      -       -      +
    341B  ASN*     1.3    64.1    +      -       -      +
    343B  VAL*     3.3     0.6    +      -       +      -
    344B  ALA*     2.8    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 341 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317B  ARG*     3.2    26.1    +      -       -      +
    334B  TYR*     5.9     1.6    -      -       -      -
    337B  ILE*     3.0    33.3    +      -       -      +
    338B  GLU*     2.9    27.2    +      -       -      +
    340B  PHE*     1.3    79.2    -      -       -      +
    342B  VAL*     1.3    56.6    +      -       -      +
    344B  ALA*     3.8     4.8    -      -       -      +
    345B  LYS*     2.9    32.2    +      -       -      +
    539B  TYR*     4.9    16.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 342 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279B  PRO*     3.6    26.7    -      -       +      -
    284B  VAL*     4.2    22.7    -      -       +      -
    338B  GLU*     2.6    37.7    +      -       +      +
    339B  SER*     3.7     5.8    -      -       -      +
    341B  ASN*     1.3    71.3    -      -       -      +
    343B  VAL*     1.3    58.0    +      -       -      +
    345B  LYS*     3.2     8.0    +      -       -      +
    346B  GLU*     2.9    31.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 343 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284B  VAL*     3.5    34.1    -      -       +      +
    287B  THR*     3.7    14.1    -      -       +      +
    288B  HIS*     3.6    39.5    -      -       +      +
    291B  ALA*     4.6     2.0    -      -       +      -
    292B  MET      4.9     0.7    -      -       -      +
    295B  LEU*     4.0    16.6    -      -       +      -
    339B  SER      3.1    17.7    +      -       -      +
    340B  PHE*     3.9     3.4    -      -       +      +
    342B  VAL*     1.3    76.7    -      -       -      +
    344B  ALA*     1.3    63.1    +      -       -      +
    346B  GLU*     3.3     5.3    +      -       -      +
    347B  VAL*     3.0    28.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 344 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295B  LEU*     3.7    26.4    -      -       +      +
    299B  PHE*     3.9     9.7    -      -       +      -
    313B  VAL*     5.8     2.9    -      -       +      -
    340B  PHE*     2.8    36.7    +      -       +      +
    341B  ASN*     3.9     4.7    -      -       -      +
    343B  VAL*     1.3    72.9    -      -       -      +
    345B  LYS*     1.3    61.0    +      -       -      +
    348B  PHE*     3.2    24.6    +      -       -      +
    540B  ASN*     4.4     3.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 345 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341B  ASN      2.9    19.7    +      -       -      +
    342B  VAL*     3.6     6.7    -      -       -      +
    344B  ALA*     1.3    74.4    -      -       -      +
    346B  GLU*     1.3    64.2    +      -       -      +
    348B  PHE*     3.4     1.6    +      -       -      +
    349B  ARG*     3.0    65.5    +      -       -      +
    539B  TYR      4.9     3.6    -      -       -      +
    540B  ASN*     3.9    36.5    +      -       -      +
    541B  GLY      4.7     3.8    +      -       -      -
    542B  ASP*     4.8     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 346 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288B  HIS*     3.8    25.6    +      -       -      +
    342B  VAL*     2.9    19.0    +      -       +      +
    343B  VAL*     3.3     5.4    +      -       -      +
    345B  LYS*     1.3    74.9    -      -       -      +
    347B  VAL*     1.3    61.8    +      -       -      +
    349B  ARG*     3.3     6.0    +      -       +      +
    350B  SER*     2.8    43.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 347 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    288B  HIS*     4.5     8.3    -      -       +      -
    292B  MET*     4.0    33.7    -      -       +      -
    295B  LEU*     3.9    12.3    -      -       +      -
    296B  TYR*     3.7    39.9    -      -       +      +
    299B  PHE*     4.1     5.4    -      -       +      -
    343B  VAL*     3.0    25.5    +      -       +      +
    344B  ALA      4.2     3.1    -      -       -      +
    346B  GLU*     1.3    77.2    -      -       -      +
    348B  PHE*     1.3    64.9    +      -       -      +
    350B  SER*     3.2    20.8    +      -       -      +
    351B  ILE*     3.4    12.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 348 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299B  PHE*     3.5    34.3    -      +       +      -
    344B  ALA      3.2    17.7    +      -       -      +
    345B  LYS      3.6     4.0    -      -       -      +
    346B  GLU      3.3     0.2    -      -       -      -
    347B  VAL*     1.3    80.4    -      -       -      +
    349B  ARG*     1.3    66.1    +      -       +      +
    351B  ILE*     3.6    11.3    +      -       -      +
    352B  VAL*     3.8    21.7    +      -       +      +
    359B  CYS*     3.7    28.0    -      -       +      -
    514B  VAL*     5.7     5.2    -      -       +      -
    536B  ILE*     3.5    33.4    -      -       +      -
    537B  GLU*     3.7    33.0    -      -       +      -
    540B  ASN*     3.5    32.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 349 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345B  LYS*     3.0    45.5    +      -       +      +
    346B  GLU*     4.1     4.9    -      -       -      +
    348B  PHE*     1.3    80.7    -      -       +      +
    350B  SER*     1.3    64.6    +      -       -      +
    352B  VAL*     3.5     2.5    +      -       -      -
    353B  LEU*     3.1    32.1    +      -       +      +
    514B  VAL*     3.6    22.8    -      -       +      +
    515B  THR*     3.1    31.4    +      -       -      +
    517B  THR*     6.0     0.4    -      -       -      +
    540B  ASN      3.0    31.8    +      -       -      +
    541B  GLY*     3.7     4.9    +      -       -      -
    542B  ASP*     2.5    46.4    +      -       -      -
    563B  LEU*     5.4     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 350 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292B  MET*     5.6     5.7    -      -       -      +
    296B  TYR*     5.6     1.6    -      -       -      -
    346B  GLU*     2.8    28.5    +      -       -      -
    347B  VAL*     3.2    14.1    +      -       -      +
    348B  PHE      3.4     0.2    -      -       -      -
    349B  ARG*     1.3    77.9    -      -       -      +
    351B  ILE*     1.3    63.7    +      -       -      +
    353B  LEU*     4.4     9.0    -      -       -      -
    354B  ASN*     2.9    46.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 351 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296B  TYR*     3.7    36.6    -      -       +      -
    299B  PHE*     3.6    38.8    -      -       +      +
    300B  THR*     4.3     3.6    -      -       +      -
    347B  VAL*     3.4    21.9    +      -       +      +
    348B  PHE      3.9     6.3    -      -       -      +
    349B  ARG      3.2     1.0    -      -       -      -
    350B  SER*     1.3    78.1    -      -       -      +
    352B  VAL*     1.3    61.0    +      -       +      +
    355B  GLU*     2.9    38.4    +      -       -      +
    356B  TYR      3.5     1.0    +      -       -      -
    357B  LYS*     3.8    38.0    -      -       +      +
    358B  ARG      5.2     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 352 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348B  PHE*     3.8    21.1    +      -       +      +
    349B  ARG      3.5     6.3    +      -       -      +
    351B  ILE*     1.3    76.9    -      -       +      +
    353B  LEU*     1.3    61.6    +      -       -      +
    356B  TYR*     3.2    14.2    +      -       -      -
    357B  LYS      3.3    19.5    -      -       -      +
    358B  ARG*     4.1    16.4    -      -       +      -
    359B  CYS      5.2     1.1    -      -       -      +
    364B  LEU*     3.9     9.0    -      -       +      -
    514B  VAL*     4.6    15.7    -      -       +      -
    528B  ARG*     3.2    27.8    +      -       +      -
    530B  LEU*     3.7    28.3    -      -       +      -
    537B  GLU*     5.2     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 353 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349B  ARG*     3.1    28.5    +      -       +      +
    350B  SER*     3.9     6.7    -      -       -      +
    352B  VAL*     1.3    78.1    -      -       -      +
    354B  ASN*     1.3    70.0    +      -       -      +
    356B  TYR*     4.1     2.8    -      -       -      -
    514B  VAL*     3.7    28.7    -      -       +      +
    515B  THR      3.8    17.7    -      -       -      +
    516B  LYS*     3.9    28.5    -      -       +      +
    526B  ASP*     4.4    11.0    -      -       +      +
    527B  TYR*     4.5     1.3    -      -       -      -
    528B  ARG*     2.7    44.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 354 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350B  SER*     2.9    35.5    +      -       -      +
    351B  ILE*     5.1     0.2    -      -       -      -
    353B  LEU*     1.3    82.5    -      -       -      +
    355B  GLU*     1.3    69.8    +      -       +      +
    356B  TYR*     3.8    12.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 355 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296B  TYR*     2.6    36.7    +      -       -      -
    351B  ILE*     2.9    19.4    +      -       -      +
    354B  ASN*     1.3    86.0    -      -       +      +
    356B  TYR*     1.3    70.5    +      -       -      +
    357B  LYS*     2.4    52.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 356 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351B  ILE      3.5     0.4    +      -       -      -
    352B  VAL      3.2    17.1    +      -       -      -
    353B  LEU      4.1     1.1    -      -       -      -
    354B  ASN      3.8    13.2    -      -       -      -
    355B  GLU*     1.3    78.9    -      -       -      +
    357B  LYS*     1.3    57.0    +      -       -      +
    363B  ASP*     4.3    12.6    -      -       -      +
    364B  LEU*     3.9    28.8    -      -       +      +
    526B  ASP*     4.6     0.9    +      -       -      -
    528B  ARG*     3.1    50.7    +      -       -      -
----------------------------------------------------------
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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