Contacts of the helix formed by residues 609 - 631 (chain G) in PDB entry 6V3O


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 GLY 609 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    605G  GLY*     2.8    18.6    +      -       -      -
    608G  ALA*     1.3    82.2    -      -       -      +
    610G  ARG*     1.3    65.4    +      -       -      -
    611G  LEU      3.4     2.4    +      -       -      -
    612G  SER      3.7     0.6    +      -       -      -
    613G  ALA*     3.1    20.8    +      -       -      +
    724G  ALA*     6.1     1.3    -      -       -      -
    728G  TYR*     3.4    27.9    -      -       -      -
    789G  PRO      5.1     0.4    -      -       -      -
    792G  LEU      4.3     4.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 610 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    601G  TYR*     4.3    24.8    +      -       -      +
    602G  SER*     4.7     2.4    +      -       -      +
    605G  GLY*     4.1    11.9    +      -       -      -
    609G  GLY*     1.3    71.2    -      -       -      -
    611G  LEU*     1.3    60.0    +      -       -      +
    613G  ALA*     3.8     1.5    -      -       +      +
    614G  ALA*     2.9    34.1    +      -       +      +
    642G  GLY*     2.5    32.9    +      -       -      -
    643G  GLY      5.1     0.2    -      -       -      -
    644G  THR*     5.2     1.8    -      -       -      +
    778G  ILE*     5.7     2.0    -      -       -      +
    789G  PRO      4.3    10.0    +      -       -      +
    790G  VAL*     3.4    39.5    -      -       -      +
    792G  LEU      4.5     5.1    +      -       -      -
    794G  VAL*     5.8     0.7    -      -       +      -
    825G  THR*     5.7     9.0    +      -       +      +
    828G  LEU*     3.7    27.3    -      -       -      +
    829G  LEU*     4.3     9.4    -      -       +      -
    970G  GLY*     3.8    25.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 611 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    609G  GLY      3.4     0.6    -      -       -      -
    610G  ARG*     1.3    78.9    -      -       -      +
    612G  SER*     1.3    61.3    +      -       -      +
    614G  ALA*     3.3     5.5    +      -       -      +
    615G  TRP*     3.2    21.3    +      -       -      +
    717G  MET*     4.8    16.7    -      -       +      +
    720G  MET*     4.2    19.7    -      -       +      +
    721G  ALA*     5.0     1.6    -      -       -      +
    724G  ALA*     4.0    15.5    -      -       +      -
    792G  LEU      5.4     0.6    +      -       -      -
    793G  GLY      5.3     0.2    -      -       -      -
    794G  VAL*     3.9    36.3    -      -       +      +
    797G  ALA*     3.6    31.6    -      -       +      -
    798G  PHE*     4.9    10.5    -      -       +      -
    822G  PHE*     5.2     8.3    -      -       +      -
    825G  THR*     5.1    15.5    -      -       +      -
    826G  LEU*     5.3     4.0    -      -       +      -
    829G  LEU*     5.5     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 612 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568G  LEU*     4.4    12.3    -      -       -      -
    608G  ALA      3.4    13.1    +      -       -      -
    609G  GLY      3.7     1.0    +      -       -      -
    610G  ARG      3.3     0.4    -      -       -      -
    611G  LEU*     1.3    74.5    -      -       -      +
    613G  ALA*     1.3    67.0    +      -       -      +
    615G  TRP*     3.1     2.6    +      -       -      +
    616G  GLN*     2.8    25.6    +      -       -      +
    619G  ARG*     5.4     0.3    +      -       -      -
    721G  ALA*     3.2    29.2    +      -       -      +
    724G  ALA*     3.7     6.2    -      -       -      +
    725G  THR*     2.8    33.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 613 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568G  LEU*     3.9    13.1    -      -       +      +
    571G  LEU*     4.8     0.3    -      -       -      +
    601G  TYR      4.5     3.6    -      -       -      +
    604G  SER*     3.6    16.8    -      -       -      +
    605G  GLY*     3.5    25.4    -      -       -      +
    609G  GLY      3.1    19.2    +      -       -      +
    610G  ARG*     3.3     5.4    +      -       +      +
    612G  SER*     1.3    76.2    -      -       -      +
    614G  ALA*     1.3    57.6    +      -       -      +
    616G  GLN*     3.9     0.9    -      -       -      +
    617G  LEU*     2.9    37.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 614 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    601G  TYR*     5.9     5.4    -      -       +      -
    610G  ARG*     2.9    20.1    +      -       +      +
    611G  LEU*     3.7     4.7    -      -       +      +
    613G  ALA*     1.3    76.8    -      -       -      +
    615G  TRP*     1.3    57.9    +      -       -      +
    617G  LEU*     3.4     9.7    +      -       -      +
    618G  TYR      3.1    21.8    +      -       -      -
    821G  PHE*     3.7    21.2    -      -       +      -
    825G  THR*     3.9    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 615 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    611G  LEU      3.2     5.8    +      -       -      +
    612G  SER*     3.1     8.5    +      -       -      +
    614G  ALA*     1.3    76.7    -      -       -      +
    616G  GLN*     1.3    65.6    +      -       -      +
    618G  TYR*     3.5    25.1    +      +       +      -
    619G  ARG*     3.2    60.7    +      -       +      +
    714G  ARG*     3.9    41.3    -      -       +      -
    717G  MET*     3.5    49.6    -      -       +      +
    718G  ASP*     2.8    25.7    +      -       -      -
    721G  ALA*     4.4     7.4    -      -       +      -
    819G  TRP*     3.6    28.5    -      +       -      -
    821G  PHE*     4.0    16.3    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLN 616 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568G  LEU*     3.7    27.7    -      -       +      +
    571G  LEU*     3.8    26.6    +      -       +      -
    572G  GLN*     3.3    43.5    +      -       +      +
    612G  SER      2.8    16.6    +      -       -      +
    613G  ALA      4.1     0.7    -      -       -      +
    615G  TRP*     1.3    77.3    -      -       -      +
    617G  LEU*     1.3    57.3    +      -       -      +
    619G  ARG*     2.9    40.5    +      -       -      +
    620G  ALA*     3.0    29.8    +      -       -      +
    623G  GLU*     5.5     2.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 617 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571G  LEU*     4.0    17.7    -      -       +      -
    599G  VAL*     3.5    41.7    -      -       +      -
    600G  GLY      3.7    16.8    -      -       -      +
    601G  TYR*     3.7    37.2    -      -       +      -
    604G  SER*     4.6     2.9    -      -       -      +
    613G  ALA*     2.9    27.3    +      -       +      +
    614G  ALA*     3.5     6.5    -      -       -      +
    615G  TRP      3.2     0.2    -      -       -      -
    616G  GLN*     1.3    74.1    -      -       -      +
    618G  TYR*     1.3    66.3    +      -       -      +
    620G  ALA*     3.3     3.1    +      -       +      +
    621G  GLN*     3.1    40.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 618 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    614G  ALA      3.1    14.2    +      -       -      +
    615G  TRP*     3.7    29.8    -      +       +      +
    616G  GLN      3.5     0.2    -      -       -      -
    617G  LEU*     1.3    75.5    -      -       -      +
    619G  ARG*     1.3    64.9    +      -       -      +
    621G  GLN*     4.6     3.6    +      -       -      -
    622G  GLU*     3.1    46.6    +      -       -      +
    658G  SER      4.1    10.8    -      -       -      -
    660G  PRO*     3.7    37.5    -      -       +      +
    661G  PRO*     3.8    17.3    -      -       -      +
    706G  PRO*     5.5     2.0    -      -       +      +
    707G  VAL      4.9     1.7    +      -       -      -
    709G  PRO*     3.6    34.1    -      -       +      +
    714G  ARG*     4.6     1.1    -      -       -      -
    819G  TRP*     4.5     5.7    +      +       -      -
    821G  PHE*     3.9    32.5    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 619 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    612G  SER      5.4     0.4    +      -       -      -
    615G  TRP*     3.2    64.4    +      -       +      +
    616G  GLN*     2.9    44.3    +      -       -      +
    618G  TYR*     1.3    79.5    -      -       +      +
    620G  ALA*     1.3    63.3    +      -       -      +
    622G  GLU*     3.2    16.0    +      -       -      +
    623G  GLU*     3.0    42.2    +      -       +      +
    714G  ARG*     4.7     4.5    -      -       -      +
    718G  ASP*     3.6    15.4    +      -       -      +
    721G  ALA*     5.3     5.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 620 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571G  LEU*     3.7    40.6    -      -       +      +
    574G  ALA*     5.0     6.1    -      -       +      -
    575G  PRO*     4.7     7.4    -      -       +      -
    599G  VAL*     6.0     1.6    -      -       +      -
    616G  GLN*     3.0    21.6    +      -       -      +
    617G  LEU*     3.9     3.4    -      -       +      +
    619G  ARG*     1.3    76.8    -      -       -      +
    621G  GLN*     1.3    63.5    +      -       +      +
    623G  GLU*     3.4     1.9    +      -       -      +
    624G  MET*     3.0    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 621 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    599G  VAL*     4.7     7.1    -      -       +      +
    601G  TYR*     4.0    13.7    +      -       -      -
    617G  LEU*     3.1    36.1    +      -       +      +
    618G  TYR*     3.8     3.9    +      -       -      +
    620G  ALA*     1.3    76.6    -      -       +      +
    622G  GLU*     1.3    64.4    +      -       -      +
    624G  MET*     4.0     5.9    -      -       -      +
    625G  ALA*     3.1    25.8    +      -       -      +
    635G  LEU*     5.3     1.2    -      -       -      +
    637G  LEU*     4.5    24.3    -      -       +      +
    639G  HIS*     4.0     9.9    +      -       -      -
    659G  GLN*     2.7    29.5    +      -       -      +
    660G  PRO*     3.4    20.2    -      -       +      +
    663G  THR*     3.8    14.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 622 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    618G  TYR*     3.1    32.4    +      -       -      +
    619G  ARG*     3.2    17.0    +      -       -      +
    621G  GLN*     1.3    78.6    -      -       -      +
    623G  GLU*     1.3    66.0    +      -       +      +
    625G  ALA*     3.5     4.2    +      -       -      +
    626G  GLN*     3.3    41.5    +      -       -      +
    660G  PRO*     4.4    11.6    -      -       +      +
    661G  PRO*     5.4     6.4    -      -       +      +
    663G  THR*     4.4     8.5    -      -       -      +
    709G  PRO*     4.8     1.4    -      -       -      +
    714G  ARG*     2.6    42.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 623 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    572G  GLN      5.7     0.5    -      -       -      +
    575G  PRO*     3.8    26.0    -      -       +      +
    616G  GLN*     5.5     2.3    +      -       -      -
    619G  ARG*     3.0    31.7    +      -       -      +
    620G  ALA*     5.0     0.5    -      -       -      -
    622G  GLU*     1.3    80.2    -      -       +      +
    624G  MET*     1.3    61.1    +      -       -      +
    626G  GLN*     3.0    19.3    +      -       -      +
    627G  VAL*     2.9    30.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 624 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    565G  PHE*     4.9     0.7    -      -       -      -
    571G  LEU*     6.4     0.4    -      -       -      -
    574G  ALA*     4.0    21.1    -      -       -      +
    575G  PRO*     3.9    25.5    -      -       +      +
    578G  VAL*     4.2    18.2    -      -       +      +
    597G  VAL*     3.5    44.9    -      -       +      -
    599G  VAL*     5.8     3.8    -      -       -      -
    620G  ALA*     3.0    26.8    +      -       -      +
    621G  GLN*     4.0     3.8    -      -       -      +
    623G  GLU*     1.3    75.0    -      -       -      +
    625G  ALA*     1.3    58.0    +      -       -      +
    627G  VAL*     3.2     9.0    +      -       -      +
    628G  ALA*     2.8    29.6    +      -       -      +
    635G  LEU*     3.8    22.7    -      -       +      +
    637G  LEU*     4.7     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 625 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621G  GLN      3.1    18.8    +      -       -      +
    622G  GLU      3.6     4.9    -      -       -      +
    624G  MET*     1.3    77.0    -      -       -      +
    626G  GLN*     1.3    57.5    +      -       +      +
    628G  ALA*     3.2     3.6    +      -       -      +
    629G  LYS*     2.9    30.4    +      -       -      +
    635G  LEU*     3.9    13.8    -      -       +      +
    637G  LEU*     6.1     0.4    -      -       +      -
    661G  PRO      5.4     0.7    -      -       -      +
    662G  ASP*     3.7    24.5    -      -       +      +
    663G  THR*     4.0    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 626 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    622G  GLU*     3.3    35.8    +      -       -      +
    623G  GLU*     3.0    21.4    +      -       -      +
    625G  ALA*     1.3    78.0    -      -       +      +
    627G  VAL*     1.3    62.5    +      -       +      +
    629G  LYS*     3.5     8.4    +      -       +      +
    630G  ARG*     3.2    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 627 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    575G  PRO*     4.0    22.0    -      -       +      +
    578G  VAL*     4.2     4.9    -      -       +      -
    579G  GLU*     3.6    41.1    -      -       +      +
    582G  PHE*     4.1    11.2    -      -       +      -
    623G  GLU*     2.9    16.7    +      -       +      +
    624G  MET*     3.6     9.4    -      -       -      +
    626G  GLN*     1.3    78.6    -      -       +      +
    628G  ALA*     1.3    62.9    +      -       -      +
    630G  ARG*     3.3    22.9    +      -       -      +
    631G  TYR*     3.3    28.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 628 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    582G  PHE*     3.9    20.6    -      -       +      -
    624G  MET      2.8    16.5    +      -       -      +
    625G  ALA*     3.2     5.1    +      -       -      +
    627G  VAL*     1.3    77.9    -      -       -      +
    629G  LYS*     1.3    61.7    +      -       -      +
    631G  TYR      3.3     1.6    +      -       -      -
    632G  GLY      3.0     5.0    +      -       -      -
    633G  VAL*     2.9    43.0    +      -       +      +
    635G  LEU*     3.8    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 629 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    625G  ALA      2.9    17.1    +      -       -      +
    626G  GLN*     3.9     9.6    -      -       +      +
    627G  VAL      3.3     0.2    -      -       -      -
    628G  ALA*     1.3    75.0    -      -       -      +
    630G  ARG*     1.3    64.6    +      -       +      +
    632G  GLY*     3.2    12.3    +      -       -      +
    633G  VAL      5.0     2.0    -      -       -      -
    662G  ASP*     6.0     6.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 630 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579G  GLU*     2.6    39.7    +      -       -      -
    626G  GLN*     3.2    16.6    +      -       -      +
    627G  VAL*     3.7    23.6    -      -       -      +
    628G  ALA      3.2     0.2    -      -       -      -
    629G  LYS*     1.3    82.1    -      -       +      +
    631G  TYR*     1.3    75.1    +      -       +      +
    632G  GLY      3.3     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 631 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579G  GLU*     3.3    37.8    +      -       +      +
    582G  PHE*     3.7    48.2    -      +       +      -
    583G  SER*     2.9    25.7    +      -       -      -
    588G  MET*     3.7    21.5    -      -       +      +
    627G  VAL*     3.3    26.7    +      -       +      +
    628G  ALA      4.2     1.1    -      -       -      +
    630G  ARG*     1.3    91.1    +      -       +      +
    632G  GLY*     1.3    63.9    +      -       -      +
    633G  VAL*     3.4     3.6    -      -       +      -
----------------------------------------------------------
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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