Contacts of the helix formed by residues 113 - 134 (chain A) in PDB entry 2OG9


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 113 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  SER*     1.3    78.8    -      -       -      +
    114A  LEU*     1.3    65.5    +      -       -      -
    115A  SER      3.3     0.9    -      -       -      -
    116A  THR*     3.2     2.9    +      -       -      -
    117A  GLN*     2.8    35.6    +      -       -      +
    268A  THR*     3.8    10.9    +      -       -      -
    109B  ALA      3.1    22.2    -      -       -      -
    110B  GLY*     5.2     0.2    -      -       -      -
    112B  SER      3.8     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 114 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  SER*     4.7     0.4    -      -       -      +
     72A  GLY*     3.8    25.1    -      -       -      +
     75A  GLY*     4.2    13.7    -      -       -      -
     76A  GLN*     3.8    15.4    -      -       +      +
     79A  HIS*     5.4     0.2    -      -       -      -
    112A  SER      4.1     0.4    +      -       -      -
    113A  GLY*     1.3    70.8    -      -       -      -
    115A  SER*     1.3    62.5    +      -       -      +
    117A  GLN*     3.4    15.0    +      -       -      +
    118A  ALA*     3.0    23.6    +      -       -      +
     75B  GLY      4.9     0.4    -      -       -      +
     79B  HIS*     3.6    36.8    -      -       +      +
    109B  ALA*     3.5    28.8    +      -       +      -
    112B  SER      5.0     0.2    +      -       -      -
    114B  LEU*     4.0    23.7    -      -       +      +
    115B  SER*     3.9    17.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  HIS*     3.4    32.6    -      -       -      -
    106A  GLY      5.2     0.9    -      -       -      -
    109A  ALA*     3.6    34.8    +      -       -      +
    110A  GLY      3.9    10.2    +      -       -      -
    112A  SER      4.0     4.7    +      -       -      -
    113A  GLY      3.3     0.2    +      -       -      -
    114A  LEU*     1.3    78.3    -      -       -      +
    116A  THR*     1.3    61.3    +      -       -      +
    118A  ALA*     3.3     5.0    +      -       -      +
    119A  ILE*     3.0    32.9    +      -       -      +
    114B  LEU*     3.9     9.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  TRP*     3.8    27.8    -      -       +      -
    103A  CYS*     4.4     2.2    -      -       -      -
    110A  GLY      4.2     6.1    -      -       -      +
    111A  ARG*     3.4    32.5    +      -       -      +
    112A  SER*     3.0    26.7    -      -       -      +
    113A  GLY      3.2     4.2    +      -       -      -
    115A  SER*     1.3    80.3    +      -       -      +
    117A  GLN*     1.3    60.8    +      -       -      +
    118A  ALA      3.2     0.2    -      -       -      -
    119A  ILE*     3.3    15.9    +      -       +      +
    120A  GLY      2.8    21.8    +      -       -      -
    268A  THR      4.4     3.8    +      -       -      -
    292A  VAL      4.8     1.6    +      -       -      -
    293A  GLY*     3.3    15.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 117 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  SER*     3.2    24.7    -      -       -      -
     67A  TYR      4.3     3.2    +      -       -      +
     68A  SER*     4.7     0.5    +      -       -      -
     76A  GLN*     2.7    37.7    +      -       -      +
    113A  GLY      2.8    23.5    +      -       -      +
    114A  LEU*     3.7    16.9    -      -       -      +
    116A  THR*     1.3    75.1    -      -       -      +
    118A  ALA*     1.3    66.6    +      -       -      +
    120A  GLY*     3.1     8.9    +      -       -      +
    121A  ALA      3.3     1.0    +      -       -      -
    268A  THR*     3.7     8.5    -      -       -      +
    290A  PRO      3.9    13.9    -      -       -      +
    291A  ARG*     3.1    37.7    +      -       -      +
    293A  GLY*     4.5     1.1    -      -       -      +
    108B  SER*     2.8    29.5    +      -       -      +
    109B  ALA*     4.1     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 118 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  LEU*     4.0    13.4    -      -       -      +
     76A  GLN*     3.6    25.3    -      -       -      +
     79A  HIS*     4.3     8.1    -      -       +      -
     80A  ALA*     3.9    17.3    -      -       +      +
     83A  ILE*     5.0     1.1    -      -       +      -
    114A  LEU      3.0    13.0    +      -       -      +
    115A  SER      3.4    10.5    -      -       -      +
    116A  THR      3.2     0.2    -      -       -      -
    117A  GLN*     1.3    77.4    -      -       -      +
    119A  ILE*     1.3    63.3    +      -       -      +
    121A  ALA*     3.1    18.9    +      -       -      +
    122A  PHE*     3.5    12.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 119 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  HIS*     5.6     1.1    -      -       -      +
     83A  ILE*     3.8    18.2    -      -       +      -
     99A  TRP*     3.4    43.1    -      -       +      +
    102A  LEU*     3.6    12.8    -      -       +      +
    103A  CYS*     3.4    42.2    -      -       +      +
    115A  SER*     3.0    19.5    +      -       -      +
    116A  THR*     3.4    20.2    -      -       +      +
    118A  ALA*     1.3    76.1    -      -       -      +
    120A  GLY*     1.3    57.6    +      -       -      +
    122A  PHE*     3.0    15.1    +      -       -      +
    123A  ASP*     2.9    23.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 120 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  PHE      4.7     2.2    -      -       -      -
     66A  SER*     5.0     0.9    -      -       -      -
    116A  THR      2.8    11.1    +      -       -      -
    117A  GLN      3.1     5.8    +      -       -      -
    118A  ALA      3.1     0.6    -      -       -      -
    119A  ILE*     1.3    77.6    -      -       -      +
    121A  ALA*     1.3    56.0    +      -       -      +
    123A  ASP*     3.5     1.9    -      -       -      +
    124A  VAL*     2.9    36.8    +      -       -      +
    290A  PRO*     5.3     2.7    -      -       -      -
    293A  GLY*     3.1    31.0    -      -       -      -
    294A  GLY*     3.8     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 121 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  LEU*     3.9    27.6    -      -       +      +
     52A  ALA*     3.6    21.9    -      -       +      +
     64A  GLY*     3.4    12.6    -      -       -      -
     65A  PHE*     3.9    14.1    -      -       -      +
     66A  SER*     4.0    12.2    -      -       -      +
    117A  GLN      3.3     4.0    +      -       -      -
    118A  ALA      3.1    11.9    +      -       -      +
    120A  GLY*     1.3    75.5    -      -       -      +
    122A  PHE*     1.3    63.4    +      -       +      +
    125A  ALA      3.3    14.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 122 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18A  VAL*     3.6    26.7    -      -       +      -
     20A  ILE*     3.6    22.9    -      -       +      -
     52A  ALA*     3.8    13.0    -      -       +      -
     54A  ILE*     3.7     7.5    -      -       +      +
     80A  ALA*     3.6    35.7    -      -       +      -
     83A  ILE*     4.1    13.7    -      -       +      -
     84A  ALA*     4.1     8.7    -      -       +      -
     87A  LEU*     3.6    26.2    -      -       +      -
    102A  LEU*     3.8    21.1    -      -       +      -
    118A  ALA      3.5    21.5    -      -       -      -
    119A  ILE*     3.0     8.1    +      -       +      +
    121A  ALA*     1.3    75.7    -      -       +      +
    123A  ASP*     1.3    59.5    +      -       -      +
    125A  ALA*     3.1     4.0    +      -       -      +
    126A  LEU*     2.9    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 123 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  ILE*     3.2    13.3    -      -       -      +
     99A  TRP*     3.6    18.7    -      -       +      +
    119A  ILE*     2.9    12.8    +      -       +      +
    120A  GLY*     3.3    14.1    +      -       -      +
    122A  PHE*     1.3    78.3    -      -       -      +
    124A  VAL*     1.3    62.1    +      -       -      +
    126A  LEU*     3.2    10.9    +      -       -      +
    127A  TRP*     3.1    32.3    +      -       -      -
    293A  GLY      4.1     0.9    -      -       -      +
    295A  ILE      2.9    12.5    +      -       -      -
    296A  THR*     2.7    51.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 124 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  GLY*     3.6    15.7    -      -       -      -
     65A  PHE*     4.1    16.2    -      -       +      +
    120A  GLY      2.9    21.0    +      -       -      +
    121A  ALA      3.9     0.2    -      -       -      +
    123A  ASP*     1.3    76.7    -      -       -      +
    125A  ALA*     1.3    57.9    +      -       -      +
    127A  TRP*     3.1     3.6    +      -       -      +
    128A  ASP*     2.9    26.9    +      -       -      +
    290A  PRO*     5.7     1.8    -      -       +      -
    294A  GLY*     4.3    10.3    -      -       -      -
    295A  ILE*     4.2    30.0    -      -       +      +
    320A  LEU*     4.3    17.3    -      -       +      -
    363A  LEU*     3.4    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 125 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ALA      3.8    10.1    -      -       -      +
     54A  ILE*     3.8    17.7    -      -       +      -
     62A  GLY*     3.4    12.5    -      -       -      +
     63A  LEU      3.5    15.0    -      -       -      -
     64A  GLY*     3.5    16.1    -      -       -      +
    121A  ALA      3.3     8.2    +      -       -      +
    122A  PHE*     3.1     9.8    +      -       -      +
    124A  VAL*     1.3    80.0    -      -       -      +
    126A  LEU*     1.3    57.1    +      -       -      +
    128A  ASP*     3.2     2.4    +      -       -      +
    129A  LEU*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 126 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15A  ILE*     4.1     8.5    -      -       +      -
     54A  ILE*     3.9    21.1    -      -       +      -
     87A  LEU*     4.8     7.4    -      -       +      -
     92A  PRO*     3.7    38.1    -      -       +      +
     95A  ILE*     3.8    27.9    -      -       +      +
     98A  LEU*     3.9    29.6    -      -       +      -
     99A  TRP      5.9     0.2    -      -       -      +
    122A  PHE*     2.9    20.7    +      -       +      +
    123A  ASP*     3.2    12.3    +      -       -      +
    125A  ALA*     1.3    75.0    -      -       -      +
    127A  TRP*     1.3    58.1    +      -       -      +
    129A  LEU*     3.3     7.7    +      -       +      +
    130A  LYS*     2.9    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 127 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  ILE*     3.4    26.5    -      -       +      +
    123A  ASP*     3.1    28.7    +      -       -      -
    124A  VAL      3.5     7.0    -      -       -      +
    126A  LEU*     1.3    74.0    -      -       -      +
    128A  ASP*     1.3    65.9    +      -       -      +
    130A  LYS*     3.3    11.8    +      -       +      +
    131A  ALA*     2.9    25.1    +      -       -      +
    138A  LEU*     4.1    13.8    -      -       +      +
    141A  LEU*     3.9    29.1    -      -       +      +
    142A  LEU*     3.6    19.7    -      -       +      -
    295A  ILE*     3.5    42.7    -      -       +      +
    296A  THR*     3.2    23.7    +      -       -      -
    299A  LEU*     3.8    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 128 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62A  GLY*     3.4     1.7    -      -       -      -
     63A  LEU*     2.8    33.4    +      -       -      +
    124A  VAL      2.9    13.2    +      -       -      +
    125A  ALA      3.4     8.1    -      -       -      +
    127A  TRP*     1.3    76.8    -      -       -      +
    129A  LEU*     1.3    58.2    +      -       -      +
    131A  ALA*     3.4     1.7    +      -       -      +
    132A  LYS*     2.8    70.4    +      -       -      +
    138A  LEU*     5.7     2.0    -      -       -      +
    295A  ILE*     5.5     0.2    -      -       -      +
    362A  GLY*     3.3     6.9    -      -       -      -
    363A  LEU*     2.8    40.5    +      -       +      +
    364A  GLY      4.3     0.5    +      -       -      -
    365A  LEU      5.3     1.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 129 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  ILE*     4.1    17.0    -      -       +      +
     56A  THR*     3.8    24.5    -      -       +      -
     60A  HIS*     3.9    14.9    +      -       +      +
     61A  GLN*     3.5    35.4    -      -       -      +
     62A  GLY*     3.9     3.3    -      -       -      +
     92A  PRO*     4.4    15.9    -      -       +      +
    125A  ALA      2.9    15.3    +      -       -      +
    126A  LEU*     3.6     7.4    -      -       +      +
    128A  ASP*     1.3    77.3    -      -       -      +
    130A  LYS*     1.3    67.5    +      -       -      +
    132A  LYS*     3.4     3.3    +      -       -      +
    133A  ARG*     3.0    47.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 130 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  PRO      5.8     0.2    -      -       -      +
     93A  SER*     2.7    49.4    +      -       -      +
     95A  ILE*     4.0    18.9    -      -       +      +
    126A  LEU      2.9    15.8    +      -       -      +
    127A  TRP*     3.8    13.7    -      -       +      +
    129A  LEU*     1.3    81.7    -      -       +      +
    131A  ALA*     1.3    63.7    +      -       -      +
    133A  ARG*     3.2    27.2    +      -       +      +
    134A  ALA*     3.3     8.0    +      -       -      +
    141A  LEU*     4.0    22.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 131 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  TRP      2.9    18.1    +      -       -      +
    130A  LYS*     1.3    77.6    -      -       -      +
    132A  LYS*     1.3    63.0    +      -       -      +
    134A  ALA*     2.9    13.5    +      -       -      +
    136A  LEU      3.1    34.9    +      -       -      +
    137A  SER      4.1     1.1    -      -       -      +
    138A  LEU*     4.1    12.8    -      -       -      -
    141A  LEU*     3.5    22.8    -      -       +      +
    362A  GLY*     3.5    16.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 132 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  HIS*     5.4     2.5    -      -       -      +
     61A  GLN*     3.5    28.8    +      -       +      +
     62A  GLY*     4.6     2.0    -      -       -      -
     63A  LEU*     4.7     3.2    -      -       -      +
    128A  ASP*     2.8    50.0    +      -       -      +
    129A  LEU*     3.7     5.2    -      -       -      +
    131A  ALA*     1.3    75.5    -      -       -      +
    133A  ARG*     1.3    61.6    -      -       -      +
    135A  GLY*     2.9    14.2    +      -       -      -
    361A  PRO*     3.9    28.1    -      -       +      +
    362A  GLY      3.9    10.8    -      -       -      +
    364A  GLY*     5.3     2.0    -      -       -      +
    365A  LEU      4.6    11.8    +      -       -      +
    366A  THR*     5.8     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 133 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  SER*     4.2    12.3    +      -       -      -
     13A  ASP*     3.1    36.3    +      -       -      +
     60A  HIS*     3.1    49.9    +      -       +      +
     92A  PRO*     3.8     6.7    -      -       -      +
     93A  SER*     4.0    15.7    +      -       -      -
    129A  LEU*     3.0    35.8    +      -       -      +
    130A  LYS*     3.2    17.3    -      -       -      +
    131A  ALA      3.1     0.2    -      -       -      -
    132A  LYS*     1.3    77.3    -      -       -      +
    134A  ALA*     1.3    58.7    +      -       -      +
    135A  GLY      3.3     0.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 134 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  LYS      3.3     6.6    +      -       -      +
    131A  ALA      2.9     9.1    +      -       -      +
    133A  ARG*     1.3    77.7    -      -       -      +
    135A  GLY*     1.3    64.2    +      -       -      +
    136A  LEU*     3.3    28.7    +      -       +      +
    141A  LEU*     4.6     9.0    -      -       +      -
----------------------------------------------------------
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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