Contacts of the helix formed by residues 567 - 588 (chain B) in PDB entry 2C6N


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 ALA 567 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  LEU*     4.6     9.8    -      -       +      +
    217B  GLN*     3.2    31.3    +      -       +      +
    218B  LEU*     4.4    24.0    -      -       +      -
    506B  VAL*     4.5     5.2    -      -       -      -
    566B  ASP*     1.3    75.8    +      -       -      +
    568B  GLN*     1.3    55.5    +      -       -      +
    569B  PRO*     3.1     3.8    -      -       -      -
    570B  LEU*     2.5    33.2    +      -       -      +
    571B  LEU*     3.1    18.4    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 568 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    575A  GLN*     3.8     9.4    -      -       +      +
    217B  GLN*     4.8     1.0    +      -       -      -
    566B  ASP*     3.6    18.4    +      -       -      +
    567B  ALA*     1.3    76.0    -      -       -      +
    569B  PRO*     1.3    66.1    -      -       +      +
    571B  LEU*     3.3    16.6    +      -       -      +
    572B  LYS*     2.9    31.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 569 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    506B  VAL      5.3     0.2    -      -       -      +
    509B  PHE*     3.7    23.7    -      -       +      +
    510B  GLN*     3.8    26.7    -      -       +      +
    513B  GLU*     4.5    11.4    -      -       +      -
    525B  LEU*     3.7     6.7    -      -       +      +
    566B  ASP*     3.7    23.6    -      -       +      +
    567B  ALA      2.8     2.0    -      -       -      -
    568B  GLN*     1.3    95.9    -      -       +      +
    570B  LEU*     1.3    57.3    +      -       -      +
    572B  LYS*     3.4    14.6    -      -       +      +
    573B  TYR*     3.0    24.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 570 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  LEU*     4.4    26.9    -      -       +      -
    221B  LEU*     5.9     1.1    -      -       +      -
    432B  LYS*     5.7     1.1    -      -       +      -
    433B  ILE*     4.5     8.7    -      -       +      -
    436B  LEU*     4.9     7.4    -      -       +      -
    505B  PHE*     3.6    11.2    -      -       +      +
    506B  VAL*     4.0    17.7    -      -       +      +
    509B  PHE*     3.3    41.2    -      -       +      +
    566B  ASP      5.1     0.4    +      -       -      +
    567B  ALA*     2.5    18.4    +      -       -      +
    569B  PRO*     1.3    73.0    -      -       -      +
    571B  LEU*     1.3    67.3    +      -       -      +
    573B  TYR*     2.7    15.0    +      -       -      +
    574B  PHE*     3.0    53.7    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 571 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    575A  GLN*     3.5    35.0    +      -       +      +
    576A  PRO*     5.7     2.0    -      -       +      -
    579A  GLN*     3.1    39.5    -      -       +      +
    217B  GLN*     4.0    19.1    -      -       -      +
    218B  LEU*     4.8     7.6    -      -       +      -
    221B  LEU*     3.8    17.5    -      -       +      -
    567B  ALA*     3.6     9.6    -      -       +      +
    568B  GLN*     3.3    28.7    -      -       -      +
    570B  LEU*     1.3    78.5    -      -       +      +
    572B  LYS*     1.3    56.8    +      -       -      +
    574B  PHE*     3.2     4.0    +      -       -      +
    575B  GLN*     3.0    28.8    +      -       -      +
    578B  THR*     4.5     4.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 572 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    572A  LYS*     4.0    39.2    -      -       +      +
    575A  GLN*     3.8    15.0    -      -       -      +
    513B  GLU*     4.9     9.3    -      -       -      +
    525B  LEU*     4.2    33.4    +      -       +      +
    526B  HIS*     5.3     2.6    +      -       -      -
    568B  GLN*     2.9    17.1    +      -       +      +
    569B  PRO*     3.4    12.0    -      -       +      +
    571B  LEU*     1.3    77.6    -      -       -      +
    573B  TYR*     1.3    60.3    +      -       -      +
    575B  GLN*     4.0    25.6    +      -       -      +
    576B  PRO*     5.1     0.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 573 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    397B  LEU*     4.0    15.5    +      -       +      +
    401B  THR*     5.5     0.2    -      -       -      +
    424B  TYR*     3.4    26.2    +      -       -      -
    425B  LEU*     3.7    14.7    -      -       +      +
    428B  MET*     3.5    17.8    -      -       +      +
    509B  PHE*     3.5    29.8    -      +       +      -
    512B  HIS*     4.1    22.4    -      +       -      -
    525B  LEU*     4.3     9.6    -      -       +      -
    526B  HIS*     3.5    54.6    +      -       +      +
    569B  PRO      3.0    13.6    +      -       -      +
    570B  LEU      2.7    15.6    +      -       -      +
    572B  LYS*     1.3    74.5    -      -       -      +
    574B  PHE*     1.3    89.3    +      +       +      +
    575B  GLN      3.9     0.2    +      -       -      -
    576B  PRO*     4.5     0.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 574 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  LEU*     4.8     2.0    -      -       +      -
    425B  LEU*     3.4    16.2    -      -       +      -
    428B  MET*     3.7    22.7    -      -       +      -
    429B  ALA*     3.4    27.6    -      -       +      -
    432B  LYS*     3.9    12.8    -      -       +      -
    433B  ILE*     3.7    21.5    -      -       +      -
    509B  PHE*     4.0     9.0    -      +       -      -
    570B  LEU*     3.0    44.0    +      -       +      +
    571B  LEU*     4.2     1.6    -      -       -      +
    573B  TYR*     1.3   103.9    -      +       -      +
    575B  GLN*     1.3    53.3    +      -       -      +
    576B  PRO*     3.4     3.1    -      -       -      -
    577B  VAL*     3.0    18.7    +      -       +      +
    578B  THR*     2.8    43.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 575 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568A  GLN*     3.6    31.1    +      -       -      +
    571A  LEU*     3.5    26.6    -      -       +      +
    572A  LYS*     3.6    15.2    +      -       -      +
    575A  GLN*     2.6    37.7    +      -       -      +
    571B  LEU      3.0     9.6    +      -       -      +
    572B  LYS*     4.2    15.4    +      -       -      +
    573B  TYR      3.6     0.4    -      -       -      -
    574B  PHE*     1.3    73.8    -      -       -      +
    576B  PRO*     1.3    74.5    -      -       +      +
    578B  THR*     4.0     6.7    -      -       +      -
    579B  GLN*     3.1    33.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 576 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217A  GLN*     6.0     3.4    -      -       +      +
    568A  GLN*     6.5     1.1    -      -       +      -
    571A  LEU*     5.9     2.5    -      -       +      -
    421B  ASP*     5.3     3.8    -      -       -      +
    422B  ILE*     4.1    14.7    -      -       +      +
    425B  LEU*     3.7    21.8    -      -       +      -
    526B  HIS*     4.4    16.2    -      -       +      +
    572B  LYS      5.1     1.3    -      -       -      +
    573B  TYR      4.5     4.5    -      -       -      +
    574B  PHE      3.7     3.6    -      -       -      -
    575B  GLN*     1.3    94.2    -      -       +      +
    577B  VAL*     1.3    57.5    +      -       -      +
    579B  GLN*     3.9     4.2    -      -       +      +
    580B  TRP*     3.0    26.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 577 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  LEU*     6.1     0.2    -      -       +      -
    422B  ILE*     4.2    11.9    -      -       +      +
    425B  LEU*     3.8    21.2    -      -       +      +
    426B  LEU*     4.1    23.1    -      -       +      +
    429B  ALA*     4.7     4.3    -      -       +      -
    433B  ILE*     5.5     2.2    -      -       +      -
    574B  PHE*     3.0    34.0    +      -       +      +
    576B  PRO*     1.3    75.8    -      -       -      +
    578B  THR*     1.3    70.6    +      -       -      +
    579B  GLN      3.0     2.0    -      -       -      -
    580B  TRP*     4.0    18.6    -      -       +      -
    581B  LEU*     2.9    49.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 578 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    578A  THR*     5.9     1.1    -      -       +      -
    579A  GLN*     4.2    21.5    -      -       -      +
    582A  GLN*     5.3     1.3    -      -       -      +
    221B  LEU*     3.4    29.4    -      -       +      +
    224B  ASN*     5.2     2.5    +      -       -      +
    571B  LEU*     4.5     5.1    +      -       +      +
    574B  PHE*     2.8    23.4    +      -       -      +
    575B  GLN*     3.1    14.5    +      -       +      -
    577B  VAL*     1.3    79.8    -      -       -      +
    579B  GLN*     1.3    67.9    +      -       -      +
    581B  LEU*     4.0     5.7    -      -       -      +
    582B  GLN*     2.9    39.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 579 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216A  GLN      5.2     0.7    -      -       -      +
    217A  GLN*     3.2    35.8    +      -       +      +
    220A  PRO*     4.0    17.9    -      -       -      +
    221A  LEU*     3.8    24.0    -      -       -      +
    571A  LEU*     4.0    29.2    -      -       +      +
    578A  THR*     4.3     9.0    -      -       -      +
    575B  GLN*     3.1    20.5    +      -       -      +
    576B  PRO*     3.9     3.6    -      -       +      +
    577B  VAL      3.0     0.2    -      -       -      -
    578B  THR*     1.3    86.0    -      -       -      +
    580B  TRP*     1.3    64.2    +      -       -      +
    581B  LEU      3.1     1.8    -      -       -      -
    582B  GLN*     3.4    12.3    +      -       -      +
    583B  GLU*     3.0    24.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 580 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228B  PHE*     3.6    27.4    -      +       -      -
    270B  PRO*     3.4    42.4    -      -       +      -
    271B  PHE*     4.0    23.5    -      +       -      -
    422B  ILE*     3.9    20.0    -      -       +      -
    426B  LEU*     5.3     0.4    -      -       +      -
    576B  PRO      3.0    20.4    +      -       -      +
    577B  VAL*     3.3    15.5    +      -       +      -
    579B  GLN*     1.3    76.6    -      -       -      +
    581B  LEU*     1.3    78.0    +      -       +      +
    583B  GLU*     3.6     4.5    +      -       +      +
    584B  GLN*     2.9    70.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 581 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  LEU*     5.4     4.3    -      -       +      +
    224B  ASN*     4.5    10.1    -      -       +      +
    225B  LEU*     4.1    33.7    -      -       +      +
    228B  PHE*     3.2    49.8    -      -       +      -
    426B  LEU*     4.3     4.7    -      -       +      -
    429B  ALA*     5.4     2.5    -      -       +      -
    433B  ILE*     6.4     1.6    -      -       +      -
    577B  VAL*     2.9    34.1    +      -       +      +
    578B  THR*     4.0     5.2    -      -       -      +
    580B  TRP*     1.3    92.1    -      -       +      +
    582B  GLN*     1.3    66.7    +      -       -      +
    584B  GLN*     3.0     5.4    +      -       -      +
    585B  ASN*     2.9    26.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 582 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  PRO*     3.9    19.5    -      -       +      +
    221A  LEU*     5.9     0.3    -      -       -      +
    224A  ASN*     3.9    17.0    -      -       -      +
    578A  THR*     5.1     1.4    -      -       -      +
    582A  GLN*     3.0    41.9    +      -       -      +
    592A  LEU*     5.3     5.5    -      -       +      +
    224B  ASN*     3.7    24.3    +      -       -      +
    578B  THR*     2.9    28.6    -      -       -      +
    579B  GLN*     3.9    17.7    +      -       -      +
    581B  LEU*     1.3    78.3    -      -       -      +
    583B  GLU*     1.3    63.3    +      -       -      +
    585B  ASN*     3.9     1.1    -      -       -      +
    586B  GLN*     3.2    22.2    +      -       -      +
    592B  LEU*     6.3     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 583 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216A  GLN*     3.7    32.7    -      -       +      +
    219A  GLU*     2.6    32.6    -      -       -      +
    220A  PRO*     3.0    32.6    -      -       +      +
    223A  LEU*     4.9     2.9    -      -       -      +
    579B  GLN      3.0    17.4    +      -       -      +
    580B  TRP*     4.0     5.8    -      -       +      +
    582B  GLN*     1.3    78.4    -      -       -      +
    584B  GLN*     1.3    68.8    +      -       +      +
    586B  GLN*     3.6     4.5    -      -       -      +
    587B  GLN*     3.1    57.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 584 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216A  GLN*     5.5     4.0    +      -       -      -
    228B  PHE*     4.4    15.2    -      -       +      -
    580B  TRP*     2.9    68.1    +      -       +      +
    581B  LEU*     3.3     7.4    -      -       -      +
    583B  GLU*     1.3    81.2    -      -       -      +
    585B  ASN*     1.3    62.5    +      -       -      +
    587B  GLN*     3.3    17.2    +      -       -      +
    588B  ASN*     2.7    43.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 585 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    224B  ASN*     2.9    51.2    +      -       -      +
    227B  ALA*     3.9     7.1    -      -       -      -
    228B  PHE*     3.5    30.0    +      -       -      +
    581B  LEU      2.9    17.9    +      -       -      +
    582B  GLN      3.9     4.3    -      -       -      +
    583B  GLU      3.3     0.2    -      -       -      -
    584B  GLN*     1.3    75.3    -      -       -      +
    586B  GLN*     1.3    58.7    +      -       -      +
    588B  ASN*     3.1     3.7    +      -       -      +
    589B  GLY      2.8    21.7    +      -       -      -
    590B  GLU*     2.9    34.3    +      -       +      +
    592B  LEU*     4.0     7.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 586 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  GLU*     4.4     8.1    +      -       -      -
    223A  LEU*     3.1    35.3    -      -       +      +
    592A  LEU*     3.6    33.2    -      -       +      +
   2434A  GOL      3.8    30.2    +      -       -      -
    582B  GLN      3.2    11.6    +      -       -      +
    583B  GLU*     3.6    12.1    +      -       -      +
    585B  ASN*     1.3    74.9    -      -       -      +
    587B  GLN*     1.3    85.1    +      -       +      +
    589B  GLY*     2.5    28.3    +      -       -      +
    590B  GLU      4.6     2.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 587 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216A  GLN*     4.7     9.7    +      -       -      +
    219A  GLU*     4.6     1.6    -      -       -      +
    583B  GLU*     3.1    45.2    +      -       +      +
    584B  GLN*     3.7    21.2    +      -       -      +
    586B  GLN*     1.3    99.8    -      -       +      +
    588B  ASN*     1.3    62.3    +      -       -      +
    589B  GLY      3.4     0.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 588 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228B  PHE*     6.0     2.6    -      -       -      -
    231B  ARG*     3.8    29.9    +      -       -      +
    235B  ARG*     5.9     0.9    +      -       -      -
    584B  GLN*     2.7    44.0    +      -       -      +
    585B  ASN      3.6     4.0    -      -       -      +
    586B  GLN      3.0     0.6    -      -       -      -
    587B  GLN*     1.3    79.8    -      -       -      +
    589B  GLY*     1.3    64.1    +      -       -      +
    590B  GLU*     3.4    19.2    +      -       -      +
----------------------------------------------------------
 Back to top of page


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