Contacts of the helix formed by residues 501 - 524 (chain C) in PDB entry 6GYS


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 501 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206C  LEU*     4.0    17.7    -      -       -      -
    498C  THR      3.6     8.9    +      -       -      -
    499C  ILE      3.4     2.6    -      -       -      -
    500C  PHE*     1.3    78.2    -      -       -      +
    502C  SER*     1.3    57.4    +      -       -      -
    504C  LEU*     2.8    34.9    +      -       -      +
    505C  ASP*     3.2    11.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 502 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    500C  PHE      3.6     0.8    +      -       -      -
    501C  GLY*     1.3    69.2    -      -       -      -
    503C  LYS*     1.3    65.9    +      -       -      +
    505C  ASP*     2.8    15.7    +      -       -      +
    506C  LYS*     2.6    59.8    +      -       -      +
    608C  SER*     4.5     8.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 503 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     3.3    30.0    -      -       +      +
     78C  TYR*     3.6    42.1    +      -       +      +
     80C  THR      5.1     6.1    +      -       -      -
    247C  TYR*     3.8    43.9    +      -       +      +
    460C  MET*     3.4    16.9    -      -       +      +
    500C  PHE*     4.1    10.5    -      -       +      +
    501C  GLY      3.3     0.4    -      -       -      -
    502C  SER*     1.3    81.9    +      -       -      +
    504C  LEU*     1.3    67.2    +      -       -      +
    506C  LYS*     4.3    15.0    -      -       +      +
    507C  LEU*     3.3    14.6    +      -       -      +
    606C  ILE      5.5     1.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 504 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    460C  MET*     3.6    15.4    -      -       +      +
    493C  THR*     4.3     7.2    -      -       +      +
    496C  LEU*     3.7    39.9    -      -       +      +
    497C  PRO      3.4    25.1    -      -       -      +
    498C  THR*     4.4    13.2    -      -       +      -
    500C  PHE*     4.0    12.6    +      -       +      -
    501C  GLY      2.8    18.2    +      -       -      +
    503C  LYS*     1.3    75.9    -      -       -      +
    505C  ASP*     1.3    65.4    +      -       -      +
    507C  LEU*     3.0    13.7    +      -       +      +
    508C  VAL*     2.9    34.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 505 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501C  GLY      3.5    11.6    -      -       -      +
    502C  SER*     2.8    24.9    +      -       -      +
    504C  LEU*     1.3    84.3    -      -       -      +
    506C  LYS*     1.3    51.5    +      -       +      +
    508C  VAL*     2.9    16.5    -      -       -      +
    509C  TYR*     2.6    32.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 506 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     3.7    21.0    -      -       +      +
    502C  SER*     2.6    43.1    +      -       -      +
    503C  LYS*     4.3    16.8    -      -       +      +
    505C  ASP*     1.3    69.8    -      -       +      +
    507C  LEU*     1.3    55.2    +      -       -      +
    509C  TYR*     2.9    13.5    +      -       -      +
    510C  LEU*     2.5    34.9    +      -       -      +
    605C  ASP      3.1    13.7    +      -       -      +
    606C  ILE*     2.9    28.1    -      -       +      +
    607C  LEU*     2.5    44.9    +      -       -      +
    608C  SER*     4.0     4.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 507 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     4.7     5.0    -      -       +      +
     78C  TYR*     4.8     2.0    -      -       -      +
    460C  MET*     4.1    14.8    -      -       +      -
    463C  ILE*     5.4     6.3    -      -       +      -
    464C  THR*     3.8    41.7    -      -       +      +
    467C  VAL*     3.9    16.8    -      -       +      -
    493C  THR*     5.6     7.9    -      -       +      +
    496C  LEU*     5.1    13.2    -      -       +      -
    503C  LYS      3.3    12.3    +      -       -      +
    504C  LEU*     3.0    15.1    +      -       +      +
    506C  LYS*     1.3    77.2    -      -       -      +
    508C  VAL*     1.3    49.9    +      -       +      +
    510C  LEU*     3.4    15.4    -      -       +      +
    511C  THR*     2.5    54.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 508 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    493C  THR*     3.8    26.5    -      -       +      -
    504C  LEU*     2.9    23.0    +      -       +      +
    505C  ASP*     2.9    19.7    +      -       -      +
    507C  LEU*     1.3    73.9    -      -       -      +
    509C  TYR*     1.3    56.4    +      -       -      +
    511C  THR*     3.7     6.8    -      -       -      -
    512C  GLU*     2.8    26.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 509 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505C  ASP      2.6    12.9    +      -       -      +
    506C  LYS*     2.9    19.0    +      -       +      +
    508C  VAL*     1.3    74.0    -      -       -      +
    510C  LEU*     1.3    52.8    +      -       +      +
    512C  GLU*     2.7    34.1    -      -       -      +
    513C  ARG*     2.6    62.6    +      -       -      +
    601C  TYR*     3.6    15.7    -      +       -      -
    602C  ASN      2.5    24.4    +      -       -      -
    603C  ILE*     4.9     1.6    -      -       +      -
    605C  ASP*     2.4    43.3    +      -       +      +
    606C  ILE*     4.2    17.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 510 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  TYR*     4.7     7.6    -      -       +      +
     72C  ILE*     4.8    13.9    -      -       +      +
     73C  THR*     5.7     3.8    -      -       +      -
     77C  LEU*     3.9    27.1    -      -       +      -
    464C  THR*     4.8     1.6    -      -       +      -
    468C  SER*     3.8    22.9    -      -       -      +
    506C  LYS      2.5    17.2    +      -       -      +
    507C  LEU*     3.4    19.5    -      -       +      +
    509C  TYR*     1.3    76.8    -      -       +      +
    511C  THR*     1.3    56.9    +      -       -      +
    513C  ARG*     2.9    11.3    +      -       +      +
    514C  LEU*     2.9    62.8    +      -       +      +
    603C  ILE*     5.8     4.9    -      -       +      -
    606C  ILE*     6.1     2.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 511 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    467C  VAL*     4.6    20.7    -      -       +      +
    471C  SER*     5.3     5.8    +      -       -      +
    486C  LEU*     5.6     5.2    -      -       +      -
    490C  THR*     5.0    16.2    -      -       +      +
    493C  THR*     4.4    21.1    +      -       +      +
    507C  LEU*     2.5    43.7    +      -       -      +
    508C  VAL*     4.0     6.7    -      -       -      -
    510C  LEU*     1.3    68.9    -      -       -      +
    512C  GLU*     1.3    60.5    +      -       -      +
    514C  LEU*     4.8     6.7    -      -       -      +
    515C  SER*     2.9    24.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 512 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    508C  VAL      2.8    16.3    +      -       -      +
    509C  TYR*     2.7    35.7    +      -       -      +
    511C  THR*     1.3    73.5    -      -       -      +
    513C  ARG*     1.3    50.8    +      -       -      +
    515C  SER*     2.3    28.6    +      -       -      -
    516C  LYS*     2.7    40.1    +      -       +      +
    601C  TYR*     3.0    32.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 513 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  TYR*     5.7     2.0    +      -       -      -
    509C  TYR*     2.6    47.4    +      -       +      +
    510C  LEU*     2.9    13.0    +      -       +      +
    512C  GLU*     1.3    72.3    -      -       -      +
    514C  LEU*     1.3    52.8    +      -       -      +
    516C  LYS*     3.0    10.6    +      -       -      +
    517C  LEU*     2.6    34.8    +      -       -      +
    540C  ILE*     4.3    16.0    -      -       -      +
    541C  LEU*     5.7     0.4    -      -       -      +
    544C  ASP*     2.7    36.7    +      -       -      -
    597C  PHE*     4.4     5.6    -      -       +      -
    598C  GLN*     4.7     6.5    -      -       -      +
    601C  TYR*     2.9    51.4    +      -       +      +
    602C  ASN      3.7     1.4    +      -       -      -
    603C  ILE*     3.2    30.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 514 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  TRP*     6.1     1.1    -      -       +      -
     68C  TYR*     3.5    29.6    -      -       +      +
    467C  VAL*     5.3     1.3    -      -       +      -
    468C  SER*     4.1    20.0    -      -       -      +
    471C  SER*     3.7    33.7    -      -       -      +
    472C  PHE*     5.7     1.8    -      -       +      +
    475C  ILE*     3.3    20.4    -      -       +      +
    510C  LEU*     2.9    42.6    +      -       +      +
    511C  THR*     4.8     3.4    -      -       -      +
    513C  ARG*     1.3    74.7    -      -       -      +
    515C  SER*     1.3    56.7    +      -       -      +
    517C  LEU*     2.9    16.9    +      -       +      +
    518C  LYS      2.8    22.7    +      -       -      -
    541C  LEU*     5.6     1.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 515 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    471C  SER*     5.5     1.0    -      -       -      -
    475C  ILE*     5.3     0.2    -      -       -      -
    486C  LEU*     6.1     6.3    -      -       -      -
    511C  THR      2.9    16.2    +      -       -      -
    512C  GLU*     2.3    30.7    +      -       -      -
    514C  LEU*     1.3    74.3    -      -       -      +
    516C  LYS*     1.3    62.9    +      -       -      +
    518C  LYS*     2.7    38.4    +      -       -      +
    519C  LEU*     3.2    12.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 516 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    512C  GLU*     2.7    41.4    +      -       +      +
    513C  ARG      3.3     7.9    -      -       -      +
    515C  SER*     1.3    72.6    -      -       -      +
    517C  LEU*     1.3    62.1    +      -       -      +
    519C  LEU*     3.0    48.4    +      -       +      +
    520C  LEU      3.4     2.9    +      -       -      -
    597C  PHE*     3.5    26.5    -      -       +      -
    601C  TYR*     3.2    33.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 517 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475C  ILE*     4.3    18.8    -      -       +      -
    476C  PHE*     4.9     1.1    -      -       +      -
    513C  ARG      2.6    15.7    +      -       -      +
    514C  LEU*     3.1    17.0    -      -       +      +
    516C  LYS*     1.3    71.1    -      -       -      +
    518C  LYS*     1.3    57.6    +      -       -      +
    520C  LEU*     2.9    19.2    +      -       +      +
    521C  TRP*     3.1    14.2    +      -       -      +
    537C  VAL*     3.7    46.4    -      -       +      -
    540C  ILE*     4.3    23.8    -      -       +      -
    541C  LEU*     3.7    33.0    -      -       +      -
    597C  PHE*     3.8    10.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 518 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474C  GLN*     2.2    61.0    +      -       +      +
    475C  ILE*     3.7    27.1    -      -       +      +
    478C  GLU*     4.0     9.9    +      -       -      +
    483C  LYS*     4.9    11.9    -      -       -      +
    486C  LEU*     4.3    15.9    -      -       +      -
    514C  LEU      2.8     5.7    +      -       -      -
    515C  SER*     2.7    28.7    -      -       -      +
    517C  LEU*     1.3    77.3    -      -       -      +
    519C  LEU*     1.3    60.8    +      -       +      +
    521C  TRP*     4.9     0.2    -      -       -      +
    522C  ASP*     3.4    24.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 519 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    515C  SER      3.2    25.6    +      -       -      +
    516C  LYS*     3.0    41.9    +      -       +      +
    518C  LYS*     1.3    79.6    -      -       +      +
    520C  LEU*     1.3    62.0    +      -       +      +
    521C  TRP      3.4     0.3    +      -       -      -
    522C  ASP*     4.5     1.6    -      -       -      +
    523C  LYS*     3.3    27.6    +      -       +      +
    597C  PHE*     5.6     3.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 520 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516C  LYS      3.4     5.6    +      -       -      +
    517C  LEU*     2.9     8.4    +      -       +      +
    519C  LEU*     1.3    79.0    -      -       +      +
    521C  TRP*     1.3    65.4    +      -       -      +
    523C  LYS*     3.3    35.6    -      -       +      +
    524C  VAL*     3.6    11.9    +      -       +      +
    535C  HIS*     3.7     8.9    -      -       +      -
    537C  VAL*     3.9    14.6    -      -       +      +
    540C  ILE*     3.8    28.0    -      -       +      -
    593C  ILE*     3.7    33.7    -      -       +      -
    597C  PHE*     4.0    24.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 521 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57C  TYR*     4.2    20.1    +      +       -      -
    475C  ILE*     3.6    18.4    +      -       +      -
    476C  PHE*     3.3    40.8    +      +       +      +
    517C  LEU      3.1    13.9    +      -       -      +
    518C  LYS      4.9     0.2    -      -       -      +
    519C  LEU      3.4     0.2    -      -       -      -
    520C  LEU*     1.3    78.4    -      -       -      +
    522C  ASP*     1.3    83.0    +      -       -      +
    524C  VAL      2.9    24.8    -      -       -      +
    526C  LEU*     3.7    29.2    -      -       +      -
    535C  HIS*     3.3    43.7    -      +       +      -
    537C  VAL*     3.7    17.9    -      -       +      +
    538C  PHE*     3.5    29.4    -      +       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 522 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475C  ILE      3.5     9.5    -      -       -      +
    476C  PHE      5.2     2.1    -      -       -      +
    478C  GLU*     2.5    29.1    -      -       -      +
    518C  LYS*     3.4    20.2    +      -       -      +
    519C  LEU      3.8     2.5    +      -       -      +
    520C  LEU      3.5     0.4    -      -       -      -
    521C  TRP*     1.3    96.2    +      -       -      +
    523C  LYS*     1.3    62.0    +      -       -      +
    524C  VAL      3.5     2.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 523 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    519C  LEU*     3.3    20.3    +      -       +      +
    520C  LEU*     3.3    36.6    -      -       +      +
    522C  ASP*     1.3    79.1    -      -       -      +
    524C  VAL*     1.3    68.4    +      -       +      +
    525C  GLN      4.2     0.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 524 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    520C  LEU*     3.6    16.4    +      -       +      +
    521C  TRP*     2.9    10.4    -      -       -      +
    522C  ASP      4.4     2.6    -      -       -      +
    523C  LYS*     1.3   102.8    -      -       +      +
    525C  GLN*     1.3    68.8    +      -       -      +
    526C  LEU      3.6     0.7    +      -       -      -
    527C  LEU*     5.5     7.2    -      -       +      -
    535C  HIS*     2.7    39.4    +      -       +      +
    536C  PRO*     4.8     6.7    -      -       +      -
    593C  ILE*     4.6    22.4    -      -       +      -
----------------------------------------------------------
 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