Contacts of the helix formed by residues 98 - 124 (chain Z) in PDB entry 6QXT


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 LYS 98 (chain Z).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96Z  ALA      3.8     1.5    +      -       -      +
     97Z  TRP*     1.3    76.6    -      -       -      +
     99Z  GLU*     1.3    61.2    +      -       -      +
    100Z  ASN*     4.1    10.1    -      -       +      +
    101Z  VAL*     3.2    18.2    +      -       +      +
    102Z  LYS*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 99 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97Z  TRP      4.3     0.2    +      -       -      -
     98Z  LYS*     1.3    74.2    -      -       -      +
    100Z  ASN*     1.3    57.2    +      -       -      +
    102Z  LYS*     3.9     6.7    -      -       -      +
    103Z  CYS*     2.9    32.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 100 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98Z  LYS*     3.2     7.2    -      -       +      +
     99Z  GLU*     1.3    79.7    -      -       -      +
    101Z  VAL*     1.3    57.5    +      -       -      +
    103Z  CYS*     4.3     2.6    -      -       -      +
    104Z  GLU*     2.9    31.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 101 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97Z  TRP*     6.0     1.3    -      -       +      -
     98Z  LYS*     3.2    20.9    +      -       +      +
    100Z  ASN*     1.3    76.5    -      -       -      +
    102Z  LYS*     1.3    61.2    +      -       -      +
    104Z  GLU*     3.9     4.0    -      -       -      +
    105Z  VAL*     2.9    33.1    +      -       -      +
    277Z  LEU*     5.1    11.4    -      -       +      +
    280Z  LEU*     4.9    21.3    -      -       +      -
    281Z  GLY      5.6     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 102 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97Z  TRP*     6.0     3.6    -      -       +      -
     98Z  LYS      3.0    15.9    +      -       -      +
     99Z  GLU*     3.9     7.0    -      -       -      +
    101Z  VAL*     1.3    77.9    -      -       -      +
    103Z  CYS*     1.3    56.9    +      -       -      +
    105Z  VAL*     4.1     1.7    -      -       -      -
    106Z  TRP*     2.9    24.9    +      -       -      +
    202Z  GLY      5.2     1.1    -      -       -      +
    203Z  LEU*     3.0    41.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 103 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99Z  GLU      2.9    18.7    +      -       -      +
    100Z  ASN*     4.3     3.4    -      -       -      +
    102Z  LYS*     1.3    77.4    -      -       -      +
    104Z  GLU*     1.3    57.6    +      -       -      +
    106Z  TRP*     4.2     2.4    -      -       -      +
    107Z  THR*     2.9    30.8    +      -       -      -
    142Z  ARG*     5.4    13.6    -      -       +      +
    143Z  PHE      5.4     5.6    -      -       -      +
    203Z  LEU      3.8     5.1    +      -       -      -
    204Z  LYS*     5.9     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 104 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100Z  ASN      2.9    21.3    +      -       -      +
    101Z  VAL*     3.9     5.4    -      -       -      +
    102Z  LYS      3.2     0.2    -      -       -      -
    103Z  CYS*     1.3    75.8    -      -       -      +
    105Z  VAL*     1.3    61.6    +      -       -      +
    107Z  THR*     3.3     5.0    +      -       -      -
    108Z  ALA*     2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 105 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101Z  VAL      2.9    18.1    +      -       -      +
    102Z  LYS*     4.2     3.1    -      -       -      +
    104Z  GLU*     1.3    76.3    -      -       -      +
    106Z  TRP*     1.3    58.3    +      -       -      +
    108Z  ALA*     3.4     6.2    +      -       -      +
    109Z  ILE*     2.9    29.3    +      -       -      +
    203Z  LEU*     5.8     2.5    -      -       +      -
    276Z  ALA*     6.3     2.9    -      -       +      -
    277Z  LEU*     6.1     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 106 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102Z  LYS      2.9    20.2    +      -       -      +
    103Z  CYS*     4.2     3.6    -      -       -      +
    105Z  VAL*     1.3    77.9    -      -       -      +
    107Z  THR*     1.3    56.4    +      -       -      +
    109Z  ILE*     3.7     6.7    -      -       -      +
    110Z  ILE*     2.9    29.6    +      -       -      +
    203Z  LEU*     3.6    26.8    -      -       +      +
    204Z  LYS*     4.5    10.8    -      -       +      +
    217Z  ASP*     5.8     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 107 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103Z  CYS      2.9    21.8    +      -       -      -
    104Z  GLU*     3.7     5.8    -      -       -      -
    106Z  TRP*     1.3    78.1    -      -       -      +
    108Z  ALA*     1.3    56.9    +      -       -      +
    110Z  ILE*     3.4     6.0    +      -       -      +
    111Z  ALA*     2.9    28.1    +      -       -      +
    140Z  LEU*     5.7     3.3    -      -       -      +
    141Z  GLU      5.2    11.2    -      -       -      -
    142Z  ARG*     5.2     8.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 108 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104Z  GLU      2.9    17.1    +      -       -      +
    105Z  VAL*     3.8     6.7    -      -       -      +
    107Z  THR*     1.3    75.7    -      -       -      +
    109Z  ILE*     1.3    58.3    +      -       -      +
    111Z  ALA*     3.3     8.2    +      -       -      +
    112Z  GLN*     2.9    27.2    +      -       -      +
    284Z  ILE*     4.8    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 109 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105Z  VAL      2.9    17.4    +      -       -      +
    106Z  TRP*     3.7     7.2    -      -       -      +
    107Z  THR      3.3     0.2    -      -       -      -
    108Z  ALA*     1.3    73.7    -      -       -      +
    110Z  ILE*     1.3    60.1    +      -       -      +
    112Z  GLN*     3.1     9.3    +      -       -      +
    113Z  LYS*     2.9    28.1    +      -       -      +
    217Z  ASP      4.3    17.9    -      -       -      +
    218Z  ILE*     6.1     0.4    -      -       -      -
    220Z  GLU*     5.6     4.0    -      -       +      -
    221Z  PRO*     4.7     6.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 110 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106Z  TRP      2.9    17.6    +      -       -      +
    107Z  THR*     3.8     6.3    -      -       -      +
    109Z  ILE*     1.3    75.7    -      -       -      +
    111Z  ALA*     1.3    57.6    +      -       -      +
    113Z  LYS*     3.2     8.0    +      -       -      +
    114Z  ILE*     2.9    31.0    +      -       -      +
    149Z  GLU*     5.2    15.0    -      -       +      -
    220Z  GLU*     5.7     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 111 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107Z  THR      2.9    17.6    +      -       -      +
    108Z  ALA*     3.5     9.4    -      -       -      +
    109Z  ILE      3.2     0.2    -      -       -      -
    110Z  ILE*     1.3    77.0    -      -       -      +
    112Z  GLN*     1.3    55.9    +      -       -      +
    114Z  ILE*     3.9     4.7    -      -       -      +
    115Z  LEU*     2.9    31.2    +      -       -      +
    137Z  TYR*     5.0    14.7    -      -       +      +
    140Z  LEU*     5.5     9.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 112 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108Z  ALA      2.9    14.0    +      -       -      +
    109Z  ILE*     3.1    12.1    +      -       -      +
    111Z  ALA*     1.3    76.8    -      -       -      +
    113Z  LYS*     1.3    56.3    +      -       -      +
    115Z  LEU*     3.5     5.5    +      -       -      +
    116Z  ASN*     2.9    28.6    +      -       -      +
    221Z  PRO*     4.5    12.3    -      -       +      +
    285Z  PRO      5.5     2.9    -      -       -      +
    286Z  GLU*     5.4     7.9    -      -       +      -
    287Z  PHE      4.7    17.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 113 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109Z  ILE      2.9    12.7    +      -       -      +
    110Z  ILE*     3.2    10.5    +      -       -      +
    112Z  GLN*     1.3    75.1    -      -       -      +
    114Z  ILE*     1.3    59.8    +      -       -      +
    116Z  ASN*     3.1     4.9    +      -       -      +
    117Z  GLN*     2.9    27.0    +      -       -      +
    220Z  GLU*     3.7    29.8    -      -       +      +
    221Z  PRO*     3.8    13.6    -      -       +      +
    224Z  PRO*     5.7     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 114 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110Z  ILE      2.9    16.7    +      -       -      +
    111Z  ALA*     4.1     4.0    -      -       -      +
    113Z  LYS*     1.3    76.5    -      -       -      +
    115Z  LEU*     1.3    57.4    +      -       -      +
    117Z  GLN*     3.2     8.4    +      -       -      +
    118Z  SER*     2.9    28.8    +      -       -      -
    133Z  ILE*     4.8     9.9    -      -       +      +
    136Z  LEU      5.6     0.7    -      -       -      -
    137Z  TYR*     4.2    23.3    -      -       +      +
    149Z  GLU*     6.2     2.5    -      -       -      -
    152Z  SER*     4.9    16.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 115 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111Z  ALA      2.9    19.9    +      -       -      +
    112Z  GLN*     3.8     7.4    -      -       -      +
    114Z  ILE*     1.3    78.3    -      -       -      +
    116Z  ASN*     1.3    55.8    +      -       -      +
    118Z  SER*     3.4     7.5    +      -       -      -
    119Z  TYR*     2.9    27.4    +      -       -      +
    137Z  TYR*     4.7     8.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 116 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112Z  GLN      2.9    19.3    +      -       -      +
    113Z  LYS      3.1     4.9    +      -       -      +
    115Z  LEU*     1.3    72.8    -      -       -      +
    117Z  GLN*     1.3    60.5    +      -       -      +
    119Z  TYR*     3.3     8.4    +      -       -      +
    120Z  TYR*     2.9    27.0    +      -       -      +
    221Z  PRO      4.1    19.1    -      -       -      +
    224Z  PRO*     4.4    12.8    -      -       +      +
    287Z  PHE      4.8    10.3    -      -       -      +
    288Z  ARG*     5.6     1.1    -      -       -      +
    289Z  ILE*     5.3    14.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 117 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113Z  LYS      2.9    13.1    +      -       -      +
    114Z  ILE*     3.2    11.9    +      -       -      +
    116Z  ASN*     1.3    74.0    -      -       -      +
    118Z  SER*     1.3    59.8    +      -       -      +
    120Z  TYR*     3.2     7.4    +      -       -      +
    121Z  LEU*     2.9    29.3    +      -       -      +
    133Z  ILE*     5.2     8.3    -      -       +      -
    152Z  SER*     5.7     5.4    -      -       -      +
    156Z  TYR*     5.2    14.6    -      -       +      -
    224Z  PRO*     4.8     7.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 118 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114Z  ILE      2.9    15.6    +      -       -      -
    115Z  LEU*     3.7     8.3    -      -       -      -
    117Z  GLN*     1.3    75.4    -      -       -      +
    119Z  TYR*     1.3    57.6    +      -       -      +
    121Z  LEU*     4.6     0.2    -      -       -      -
    122Z  GLY*     2.9    23.2    +      -       -      -
    130Z  SER*     3.5    35.3    -      -       -      +
    133Z  ILE*     4.4     4.6    -      -       -      +
    134Z  MET*     4.2    18.8    -      -       -      -
    137Z  TYR*     6.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 119 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115Z  LEU      2.9    17.2    +      -       -      +
    116Z  ASN*     3.6     9.0    -      -       -      +
    117Z  GLN      3.2     0.4    -      -       -      -
    118Z  SER*     1.3    76.1    -      -       -      +
    120Z  TYR*     1.3    59.1    +      -       -      +
    122Z  GLY*     3.8     1.1    -      -       -      -
    123Z  GLU*     2.9    28.6    +      -       -      +
    288Z  ARG*     6.2     2.0    -      -       +      -
    289Z  ILE*     5.1    17.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 120 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116Z  ASN      2.9    16.5    +      -       -      +
    117Z  GLN*     3.2     8.0    +      -       -      +
    119Z  TYR*     1.3    75.0    -      -       -      +
    121Z  LEU*     1.3    60.6    +      -       -      +
    123Z  GLU*     3.3     7.0    +      -       -      +
    124Z  CYS*     2.9    27.8    +      -       -      +
    224Z  PRO*     4.7    15.0    -      -       +      +
    228Z  ARG*     6.4     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 121 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117Z  GLN      2.9    15.3    +      -       -      +
    118Z  SER*     4.6     0.2    -      -       -      -
    120Z  TYR*     1.3    75.7    -      -       -      +
    122Z  GLY*     1.3    57.3    +      -       -      +
    124Z  CYS*     3.3     8.2    +      -       -      +
    125Z  SER      3.0     7.6    +      -       -      -
    126Z  PHE*     2.9    35.0    +      -       +      +
    129Z  LYS*     4.7     5.2    -      -       +      -
    130Z  SER*     3.6    30.1    -      -       -      +
    133Z  ILE*     6.2     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 122 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146O  SER      5.9     2.5    -      -       -      -
    147O  ASN*     6.1     3.8    -      -       -      +
    150O  GLY      6.0     0.5    -      -       -      -
    151O  HIS*     5.3     3.8    +      -       -      +
    118Z  SER      2.9    17.8    +      -       -      -
    119Z  TYR*     3.8     2.9    -      -       -      -
    120Z  TYR      3.2     0.4    -      -       -      -
    121Z  LEU*     1.3    75.8    -      -       -      +
    123Z  GLU*     1.3    63.8    +      -       -      +
    125Z  SER*     3.1    13.2    +      -       -      -
    126Z  PHE      4.7     2.7    -      -       -      -
    130Z  SER*     3.8     7.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 123 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119Z  TYR      2.9    18.4    +      -       -      +
    120Z  TYR*     3.7     7.4    -      -       -      +
    122Z  GLY*     1.3    75.9    -      -       -      +
    124Z  CYS*     1.3    59.3    +      -       -      +
    125Z  SER*     3.2     3.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 124 (chain Z). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    120Z  TYR      2.9    17.8    +      -       -      +
    121Z  LEU*     3.7     9.2    -      -       -      +
    122Z  GLY      3.2     0.4    -      -       -      -
    123Z  GLU*     1.3    74.9    -      -       -      +
    125Z  SER*     1.3    69.3    +      -       -      +
    126Z  PHE*     3.4     5.4    +      -       +      +
----------------------------------------------------------
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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