Contacts of the helix formed by residues 275 - 298 (chain C) in PDB entry 6Q3W


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 PHE 275 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  VAL*     5.6     6.1    -      -       +      -
    263C  LEU*     3.2    46.7    -      -       +      -
    264C  GLU*     4.5     5.4    -      -       -      -
    266C  ALA      5.5     0.4    -      -       -      -
    267C  ARG*     4.0    51.6    -      -       +      +
    270C  VAL*     4.9    13.9    -      -       +      -
    271C  SER*     3.1    21.4    +      -       -      +
    272C  LYS*     2.8     5.7    -      -       -      +
    273C  GLU*     1.3    72.8    -      -       -      +
    276C  ARG*     1.3    67.7    +      -       -      +
    277C  ARG      3.3     0.4    -      -       -      -
    278C  ALA*     3.4    14.4    +      -       +      +
    279C  ARG*     3.3    25.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 276 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272C  LYS      3.7     6.1    +      -       -      +
    273C  GLU*     4.1    11.9    -      -       +      -
    275C  PHE*     1.3    79.5    -      -       -      +
    277C  ARG*     1.3    55.0    +      -       -      +
    279C  ARG*     2.6    30.8    +      -       -      +
    280C  HIS      3.2     1.4    +      -       -      -
    317C  ASP*     2.6    40.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 277 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239C  ARG*     5.4     4.5    -      -       -      +
    242C  GLN*     3.6    33.4    -      -       +      +
    243C  CYS*     5.4     7.1    -      -       -      +
    246C  VAL*     5.9     2.2    -      -       +      -
    255C  LEU*     5.0     0.6    -      -       -      +
    273C  GLU*     3.0     9.4    +      -       +      +
    276C  ARG*     1.3    79.5    -      -       -      +
    278C  ALA*     1.3    61.7    +      -       -      +
    280C  HIS      3.3     8.5    +      -       -      -
    281C  VAL*     3.4    11.4    +      -       -      +
    317C  ASP*     4.3     3.6    +      -       -      +
    318C  TYR*     3.6    32.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 278 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243C  CYS*     5.9     0.2    -      -       -      -
    246C  VAL*     3.7    35.3    -      -       +      +
    255C  LEU*     3.9    24.6    -      -       +      +
    258C  VAL*     6.3     0.7    -      -       +      -
    263C  LEU*     5.7     5.2    -      -       +      -
    273C  GLU      4.5     0.6    +      -       -      -
    275C  PHE*     3.4    18.2    +      -       +      +
    276C  ARG      3.2     0.6    -      -       -      -
    277C  ARG*     1.3    77.6    -      -       -      +
    279C  ARG*     1.3    62.2    +      -       -      +
    281C  VAL*     4.0     1.0    -      -       -      +
    282C  VAL*     3.2    27.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 279 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  LEU*     5.9     1.4    -      -       -      +
    263C  LEU*     6.2     2.0    -      -       -      -
    275C  PHE*     3.3    23.8    +      -       +      +
    276C  ARG*     2.6    21.7    +      -       -      +
    278C  ALA*     1.3    71.3    -      -       -      +
    280C  HIS*     1.3    62.5    +      -       -      +
    282C  VAL*     4.5     2.4    -      -       -      +
    283C  GLY*     3.1    20.3    +      -       -      -
    287C  ARG*     4.7     1.7    +      -       -      -
    313C  SER*     4.9     0.2    +      -       -      -
    317C  ASP*     3.6    13.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 280 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43C  GLU      2.9    25.7    +      -       -      -
     44C  HIS*     4.2     2.2    -      -       +      +
    276C  ARG      3.2     5.1    +      -       -      -
    277C  ARG      3.3     1.5    +      -       -      +
    279C  ARG*     1.3    77.9    -      -       -      +
    281C  VAL*     1.3    58.1    -      -       -      +
    284C  GLU*     2.6    64.1    +      -       -      +
    287C  ARG*     3.0     4.0    +      -       -      +
    310C  SER      4.2     0.2    -      -       -      -
    313C  SER*     2.6    37.3    +      -       -      +
    314C  LEU*     3.4    32.7    -      -       +      +
    317C  ASP*     4.1     7.7    +      -       -      +
    318C  TYR*     3.5    44.6    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 281 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44C  HIS      4.5     3.4    -      -       -      +
     45C  THR*     4.4     5.2    -      -       +      -
     48C  ASN*     3.7    27.8    -      -       +      +
    243C  CYS*     5.4     2.0    -      -       -      -
    255C  LEU*     3.7    24.7    -      -       +      -
    277C  ARG      3.4     7.5    +      -       -      +
    279C  ARG      3.4     0.2    -      -       -      -
    280C  HIS*     1.3    86.2    -      -       +      +
    282C  VAL*     1.3    58.5    +      -       -      +
    284C  GLU*     3.7     2.6    -      -       -      +
    285C  ILE*     2.8    38.8    +      -       +      +
    318C  TYR*     5.4     1.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 282 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255C  LEU*     4.9     7.3    -      -       +      +
    258C  VAL*     4.1    25.4    -      -       +      +
    259C  GLN      4.8     0.4    -      -       -      -
    260C  LEU*     4.5    23.0    +      -       +      +
    263C  LEU*     5.8     3.1    -      -       +      -
    278C  ALA      3.2    17.5    +      -       -      +
    279C  ARG*     4.5     2.5    -      -       -      +
    281C  VAL*     1.3    79.5    -      -       -      +
    283C  GLY*     1.3    63.4    +      -       -      +
    285C  ILE*     3.7    10.3    +      -       -      +
    286C  ARG*     3.4    17.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 283 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  LEU*     5.0    15.5    -      -       -      +
    279C  ARG      3.1    15.2    +      -       -      -
    282C  VAL*     1.3    79.4    -      -       -      +
    284C  GLU*     1.3    50.2    +      -       -      +
    286C  ARG*     3.0     9.4    +      -       -      +
    287C  ARG*     2.8    54.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 284 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  ILE*     5.8     0.2    -      -       -      -
     42C  GLY*     3.1    13.2    +      -       -      -
     43C  GLU*     2.9    28.2    +      -       -      +
     45C  THR*     3.5    24.7    -      -       +      -
    280C  HIS*     2.6    32.9    +      -       +      +
    283C  GLY*     1.3    72.2    -      -       -      +
    285C  ILE*     1.3    56.6    +      -       -      +
    287C  ARG*     2.7    36.2    +      -       -      +
    288C  THR*     2.8    35.3    +      -       -      -
    310C  SER*     2.6    33.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 285 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45C  THR*     3.7    13.0    -      -       +      -
     48C  ASN*     4.3     8.1    -      -       +      +
     50C  GLY*     3.7    26.9    -      -       -      -
     51C  LEU*     3.4    27.4    -      -       +      +
    255C  LEU      4.6     1.1    -      -       -      -
    256C  ARG*     3.7    45.5    -      -       +      +
    281C  VAL*     2.8    25.7    +      -       +      +
    282C  VAL*     3.8     8.7    -      -       -      +
    284C  GLU*     1.3    76.1    -      -       -      +
    286C  ARG*     1.3    61.4    +      -       -      +
    288C  THR*     3.4     3.6    +      -       -      -
    289C  ALA*     3.2    17.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 286 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  LEU*     6.0     4.9    -      -       +      -
    282C  VAL      3.4     9.4    +      -       -      +
    283C  GLY*     3.0    11.0    +      -       -      +
    285C  ILE*     1.3    78.1    -      -       -      +
    287C  ARG*     1.3    66.6    +      -       +      +
    289C  ALA*     3.3     7.2    +      -       -      +
    290C  GLN*     3.1    35.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 287 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  ILE*     6.0     1.1    -      -       -      -
    279C  ARG      4.9     1.8    +      -       -      -
    280C  HIS*     3.0    22.0    +      -       -      -
    283C  GLY*     2.8    31.2    +      -       -      +
    284C  GLU*     2.7    42.7    +      -       -      +
    286C  ARG*     1.3    72.5    -      -       +      +
    288C  THR*     1.3    57.3    +      -       -      +
    290C  GLN*     3.4     2.5    +      -       -      -
    291C  ALA*     3.0    26.9    +      -       -      +
    306C  LEU*     3.6    37.0    -      -       +      +
    309C  GLU*     4.0    27.8    +      -       -      +
    310C  SER*     3.9     3.4    -      -       -      +
    313C  SER*     3.0    35.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 288 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  ILE*     4.1    17.9    -      -       +      +
     42C  GLY*     3.2    22.9    +      -       -      -
     51C  LEU*     3.6    32.7    +      -       +      +
     52C  VAL      4.1     8.5    -      -       -      +
     53C  LEU*     4.3     6.1    -      -       +      +
    200C  LEU*     4.2     8.7    -      -       +      +
    284C  GLU*     2.8    20.9    +      -       -      +
    285C  ILE      3.7     4.7    -      -       -      -
    287C  ARG*     1.3    74.7    -      -       -      +
    289C  ALA*     1.3    62.6    +      -       -      +
    291C  ALA*     2.9    21.3    +      -       +      +
    292C  ALA*     3.1    14.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 289 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51C  LEU*     3.6    24.4    -      -       +      +
    200C  LEU*     5.8     3.1    -      -       -      -
    285C  ILE      3.2     5.7    +      -       -      +
    286C  ARG*     3.6    11.4    -      -       -      +
    288C  THR*     1.3    78.5    -      -       -      +
    290C  GLN*     1.3    62.4    +      -       +      +
    291C  ALA      3.7     0.2    +      -       -      -
    292C  ALA*     4.1     4.6    +      -       -      +
    293C  ALA*     3.9    17.0    +      -       -      +
    296C  ARG*     5.3     1.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 290 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286C  ARG*     3.1    23.3    +      -       +      +
    287C  ARG*     3.8     6.1    -      -       -      +
    289C  ALA*     1.3    76.7    -      -       +      +
    291C  ALA*     1.3    60.2    +      -       -      +
    293C  ALA*     3.9     4.3    +      -       -      +
    294C  ALA*     3.2    27.4    +      -       -      +
    297C  ARG*     5.0     2.4    +      -       -      -
    306C  LEU*     3.7    24.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 291 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     41C  ILE*     4.6    16.4    -      -       +      -
     53C  LEU*     4.5    10.0    -      -       +      +
    287C  ARG      3.0    13.3    +      -       -      +
    288C  THR*     2.9    13.2    +      -       -      +
    290C  GLN*     1.3    76.6    -      -       -      +
    292C  ALA*     1.3    60.0    +      -       -      +
    294C  ALA*     3.2     5.9    -      -       -      +
    295C  LEU*     2.9    27.2    +      -       -      +
    303C  PHE*     4.8    10.0    -      -       +      +
    306C  LEU*     3.7    17.3    -      -       +      -
    307C  MET*     6.4     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 292 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53C  LEU*     4.1    15.6    -      -       +      +
    200C  LEU*     3.8    31.2    -      -       +      -
    211C  VAL*     4.7     3.4    -      -       +      +
    288C  THR      3.1    12.3    +      -       -      +
    289C  ALA*     4.4     4.3    -      -       -      +
    291C  ALA*     1.3    73.2    -      -       -      +
    293C  ALA*     1.3    61.0    +      -       -      +
    295C  LEU*     2.9     8.9    +      -       -      +
    296C  ARG*     2.8    46.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 293 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289C  ALA      3.9    13.0    +      -       -      +
    290C  GLN*     3.9     5.5    +      -       -      +
    291C  ALA      3.4     0.2    -      -       -      -
    292C  ALA*     1.3    75.6    -      -       -      +
    294C  ALA*     1.3    63.3    +      -       -      +
    296C  ARG*     3.2    22.7    +      -       -      +
    297C  ARG*     2.9    45.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 294 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290C  GLN      3.2    14.8    +      -       -      +
    291C  ALA*     3.2    13.5    -      -       -      +
    293C  ALA*     1.3    78.2    -      -       -      +
    295C  LEU*     1.3    55.3    +      -       -      +
    297C  ARG*     3.2    20.7    +      -       -      +
    298C  GLY      2.9     7.4    +      -       -      -
    299C  ASP*     2.7    50.6    +      -       +      +
    302C  ALA*     4.6     4.7    -      -       +      -
    303C  PHE*     4.3    12.6    -      -       +      +
    306C  LEU*     5.0     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 295 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40C  LEU*     4.9     5.6    -      -       +      -
     53C  LEU*     4.5    14.1    -      -       +      -
    198C  ALA*     4.3    17.3    -      -       +      -
    211C  VAL*     3.7    24.9    -      -       +      -
    212C  PRO      4.7     5.7    -      -       -      +
    213C  LEU*     3.7    33.2    -      -       +      -
    291C  ALA      2.9    14.0    +      -       -      +
    292C  ALA*     2.9    13.0    +      -       -      +
    294C  ALA*     1.3    76.3    -      -       -      +
    296C  ARG*     1.3    55.4    +      -       -      +
    298C  GLY*     3.0    18.8    +      -       -      +
    299C  ASP      4.9     0.2    -      -       -      +
    300C  TYR*     4.3    22.3    +      -       +      -
    303C  PHE*     5.3     7.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 296 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207B  GLU*     2.8    43.4    +      -       -      +
    200C  LEU*     3.6    26.5    -      -       -      +
    209C  SER*     4.4     4.6    +      -       -      -
    211C  VAL*     4.1    15.0    -      -       +      +
    289C  ALA      5.3     1.2    +      -       -      -
    292C  ALA*     2.8    22.9    +      -       -      +
    293C  ALA*     3.2    37.9    +      -       -      +
    295C  LEU*     1.3    76.5    -      -       -      +
    297C  ARG*     1.3    62.6    +      -       +      +
    298C  GLY      3.1     0.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 297 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290C  GLN      5.0     2.0    +      -       -      -
    293C  ALA*     2.9    40.2    +      -       +      +
    294C  ALA*     3.7    20.9    -      -       -      +
    296C  ARG*     1.3    77.0    -      -       +      +
    298C  GLY*     1.3    58.8    +      -       -      +
    299C  ASP*     3.1    33.5    +      -       +      +
    302C  ALA*     5.0     2.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 298 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294C  ALA      2.9     2.6    +      -       -      -
    295C  LEU      3.0    15.1    +      -       -      -
    296C  ARG      3.1     1.6    +      -       -      -
    297C  ARG*     1.3    79.3    -      -       -      +
    299C  ASP*     1.3    50.6    +      -       -      +
    300C  TYR*     2.8    50.9    +      -       -      -
----------------------------------------------------------
 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