Contacts of the helix formed by residues 67 - 91 (chain A) in PDB entry 2QKW


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 ASN 67 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  GLN      5.4     1.0    +      -       -      -
     64A  SER*     3.1    28.4    +      -       -      +
     65A  LEU      3.2     1.3    -      -       -      +
     66A  ARG*     1.3    76.0    +      -       -      +
     68A  ARG*     1.3    52.7    +      -       -      +
     69A  TYR      2.7    16.7    +      -       -      -
     70A  ASN*     2.7    26.0    +      -       +      +
     71A  ASN*     2.8    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65A  LEU*     3.4    20.5    +      -       -      +
     66A  ARG*     4.3    13.9    -      -       -      +
     67A  ASN*     1.3    75.3    -      -       -      +
     69A  TYR*     1.3    56.4    +      -       -      +
     71A  ASN*     4.3     7.9    -      -       -      +
     72A  LEU*     3.1    28.0    +      -       -      +
    115A  ASP      4.8     1.8    +      -       -      -
    118A  ASP*     4.4    10.9    -      -       -      +
    119A  MET*     3.2    50.2    -      -       -      +
    122A  ALA*     3.7    23.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  LEU*     3.3    38.3    -      -       +      +
     54A  HIS*     3.2    32.1    +      +       -      -
     57A  VAL*     4.6    18.4    -      -       +      -
     66A  ARG      3.9    10.9    +      -       -      +
     67A  ASN*     2.7     4.4    +      -       -      -
     68A  ARG*     1.3    75.0    -      -       -      +
     70A  ASN*     1.3    89.4    +      -       -      +
     72A  LEU*     3.0     6.6    +      -       -      +
     73A  TYR*     2.7    57.3    +      +       +      +
    116A  TRP*     3.5    21.5    -      +       -      -
    119A  MET*     3.6    24.1    -      -       +      +
    123A  LEU*     5.6     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  VAL*     5.6     4.4    -      -       -      +
     67A  ASN*     2.7    19.1    +      -       +      +
     69A  TYR*     1.3   101.0    -      -       -      +
     71A  ASN*     1.3    58.3    +      -       -      +
     73A  TYR*     3.9    10.4    -      -       -      +
     74A  SER*     3.4    21.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67A  ASN*     2.8    36.4    +      -       -      +
     68A  ARG*     4.3     5.8    -      -       -      +
     70A  ASN*     1.3    76.7    -      -       -      +
     72A  LEU*     1.3    59.5    +      -       -      +
     74A  SER*     3.0    19.3    +      -       -      -
     75A  HIS*     3.1    16.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 72 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  ARG      3.1    16.6    +      -       -      +
     69A  TYR      3.0     3.4    +      -       -      +
     71A  ASN*     1.3    75.3    -      -       -      +
     73A  TYR*     1.3    54.7    +      -       -      +
     75A  HIS*     3.2    14.4    +      -       +      +
     76A  THR*     2.5    53.7    +      -       -      +
    112A  ALA*     4.4     2.7    -      -       +      +
    115A  ASP*     3.6    36.8    -      -       +      +
    116A  TRP*     3.6    33.9    -      -       +      +
    119A  MET*     3.6    28.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  ALA*     5.1     9.0    -      -       +      -
     69A  TYR*     2.7    45.4    +      +       +      +
     70A  ASN*     3.9    15.9    -      -       -      +
     71A  ASN      3.3     0.2    -      -       -      -
     72A  LEU*     1.3    71.8    -      -       -      +
     74A  SER*     1.3    65.2    +      -       -      +
     76A  THR*     3.0    10.4    +      -       -      -
     77A  GLN*     3.0    53.2    +      -       +      +
    116A  TRP*     3.9    22.6    -      +       +      -
----------------------------------------------------------
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Residues in contact with SER 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70A  ASN      3.4    12.0    +      -       -      -
     71A  ASN*     3.0    17.3    +      -       -      -
     73A  TYR*     1.3    80.5    -      -       -      +
     75A  HIS*     1.3    61.1    +      -       -      +
     77A  GLN*     3.1    14.0    +      -       -      +
     78A  ARG*     3.0    34.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 75 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  ASN      3.1    14.6    +      -       -      +
     72A  LEU*     3.2    17.0    +      -       +      +
     74A  SER*     1.3    80.5    +      -       -      +
     76A  THR*     1.3    61.4    +      -       -      +
     78A  ARG*     3.1    31.2    +      -       +      +
     79A  THR*     2.8    49.4    +      -       +      -
    108A  ASP*     5.0     8.5    -      -       +      -
    112A  ALA*     4.9    11.5    -      -       +      +
    115A  ASP*     5.4     5.4    -      -       -      -
    244B  SER      4.9     4.9    -      -       -      -
    245B  LEU*     5.3     9.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  LEU*     3.7    36.6    -      -       +      -
     47A  ALA*     4.0    11.4    -      -       +      -
     72A  LEU*     2.5    33.6    +      -       -      +
     73A  TYR*     3.4     9.2    -      -       -      -
     75A  HIS*     1.3    70.9    -      -       -      +
     77A  GLN*     1.3    60.3    +      -       -      +
     79A  THR*     3.6     6.5    -      -       -      -
     80A  LEU*     2.8    43.1    +      -       +      +
    112A  ALA*     5.1     2.0    -      -       +      +
    116A  TRP*     3.1    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73A  TYR*     3.0    43.1    +      -       +      +
     74A  SER*     3.2    13.9    -      -       -      +
     76A  THR*     1.3    73.7    -      -       -      +
     78A  ARG*     1.3    66.0    +      -       -      +
     80A  LEU*     3.2    17.1    +      -       -      +
     81A  ASP*     2.9    35.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  SER*     3.0    29.3    +      -       -      -
     75A  HIS*     3.4    31.9    -      -       +      +
     77A  GLN*     1.3    77.2    -      -       +      +
     79A  THR*     1.3    60.7    +      -       -      +
     81A  ASP*     3.9     6.7    -      -       -      +
     82A  MET*     3.2    29.1    +      -       +      +
    244B  SER*     2.8    57.2    +      -       -      +
    245B  LEU*     4.0    12.7    +      -       -      +
    246B  PRO      5.1     6.5    +      -       -      -
    250B  VAL*     5.7     4.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43A  LEU*     4.1     5.8    -      -       +      -
     75A  HIS*     2.8    45.4    +      -       -      -
     76A  THR*     3.6     8.1    -      -       -      -
     77A  GLN      3.2     0.2    -      -       -      -
     78A  ARG*     1.3    74.0    -      -       -      +
     80A  LEU*     1.3    57.1    +      -       -      +
     82A  MET*     3.4     4.7    +      -       -      +
     83A  ALA*     2.9    29.7    +      -       -      +
    105A  ASN*     4.9     1.6    -      -       +      +
    108A  ASP*     4.2    14.9    -      -       +      +
    109A  MET*     3.6    42.2    -      -       +      +
    112A  ALA*     4.8     1.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  ARG*     3.6    56.9    +      -       +      +
     43A  LEU*     3.7    20.2    -      -       +      -
     44A  ALA*     4.1    17.9    -      -       +      -
     47A  ALA*     5.5     1.8    -      -       +      -
     76A  THR*     2.8    32.0    +      -       +      +
     77A  GLN*     3.8    17.7    -      -       -      +
     79A  THR*     1.3    74.9    -      -       -      +
     81A  ASP*     1.3    59.7    +      -       -      +
     83A  ALA*     3.4     4.8    +      -       -      +
     84A  ASP*     2.8    36.0    +      -       -      +
    109A  MET*     5.4     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  GLN*     2.9    27.7    +      -       -      +
     78A  ARG*     3.9     6.3    +      -       -      +
     80A  LEU*     1.3    74.5    -      -       -      +
     82A  MET*     1.3    56.7    +      -       +      +
     84A  ASP*     3.1    12.1    +      -       -      +
     85A  MET*     2.8    41.3    +      -       +      +
     88A  ARG*     4.5     2.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  ARG*     3.2    17.4    +      -       +      +
     79A  THR*     3.8     4.5    -      -       -      +
     81A  ASP*     1.3    79.1    -      -       +      +
     83A  ALA*     1.3    57.5    +      -       -      +
     85A  MET*     3.4     9.9    +      -       +      +
     86A  GLN*     2.8    30.5    +      -       -      +
     98A  PRO*     4.4     8.9    -      -       -      +
    100A  MET*     3.7    36.6    -      -       +      -
    105A  ASN*     3.4     7.2    -      -       -      +
    205B  LEU*     3.8    31.6    -      -       +      -
    242B  VAL*     5.6     7.6    -      -       +      -
    244B  SER*     4.3    17.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     3.8     7.5    -      -       +      +
     40A  ARG*     4.1    13.0    -      -       +      -
     79A  THR      2.9    18.1    +      -       -      +
     80A  LEU*     3.5     6.5    -      -       -      +
     82A  MET*     1.3    77.9    -      -       -      +
     84A  ASP*     1.3    56.1    +      -       -      +
     86A  GLN*     3.4     4.7    +      -       -      +
     87A  HIS*     3.0    28.6    +      -       -      +
    105A  ASN*     3.6    12.7    +      -       +      +
    109A  MET*     3.8    32.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37A  LEU*     6.0     1.7    -      -       -      +
     40A  ARG*     3.0    44.2    +      -       -      +
     80A  LEU*     2.8    27.9    +      -       -      +
     81A  ASP*     3.1    11.3    +      -       -      +
     83A  ALA*     1.3    71.9    -      -       -      +
     85A  MET*     1.3    68.4    +      -       -      +
     87A  HIS*     3.3     8.9    +      -       -      +
     88A  ARG*     3.3    43.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ASP*     2.8    20.5    +      -       +      +
     82A  MET*     3.6    12.1    -      -       +      +
     84A  ASP*     1.3    74.5    -      -       -      +
     86A  GLN*     1.3    64.3    +      -       -      +
     87A  HIS      3.1     1.0    +      -       -      -
     88A  ARG*     3.2    34.7    +      -       -      +
     89A  TYR*     3.2    12.8    +      -       -      +
     96A  ILE*     4.4    23.0    -      -       +      +
     98A  PRO*     4.2    15.7    -      -       +      -
    205B  LEU*     3.9    39.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     4.4     6.3    -      -       +      -
     82A  MET      2.8    17.4    +      -       -      +
     83A  ALA*     3.4     6.7    -      -       -      +
     85A  MET*     1.3    72.5    -      -       -      +
     87A  HIS*     1.3    61.8    +      -       -      +
     89A  TYR*     3.4     6.4    +      -       -      +
     90A  MET*     3.1    41.6    +      -       -      +
     97A  ASN*     4.5     3.8    -      -       -      +
     98A  PRO*     3.4    26.2    -      -       +      +
    100A  MET*     2.5    31.0    +      -       -      +
    101A  LEU*     3.8     4.9    -      -       -      +
    102A  PRO*     3.8    11.4    -      -       +      +
    105A  ASN*     3.1    33.7    -      -       -      +
     51B  VAL*     4.8     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  SER*     3.5    36.1    +      -       -      -
     34A  SER*     5.5     0.2    -      -       -      -
     36A  LEU*     4.8     7.2    -      -       +      +
     37A  LEU*     3.5    36.8    -      -       +      +
     83A  ALA      3.0    13.8    +      -       -      +
     84A  ASP*     3.5    12.1    +      -       -      +
     85A  MET      3.2     0.4    -      -       -      -
     86A  GLN*     1.3    76.3    -      -       -      +
     88A  ARG*     1.3    62.6    +      -       -      +
     90A  MET*     2.9    10.0    +      -       -      +
     91A  THR*     2.8    56.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ASP      4.5     2.0    +      -       -      -
     84A  ASP*     3.3    26.6    +      -       -      +
     85A  MET*     3.2    43.4    +      -       -      +
     87A  HIS*     1.3    81.7    -      -       -      +
     89A  TYR*     1.3    58.1    +      -       -      +
     91A  THR*     3.6     2.4    +      -       -      -
     92A  GLY      3.1     6.4    +      -       -      -
     93A  ALA*     2.8    49.5    +      -       +      -
     94A  SER*     3.0    22.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  MET      3.2     6.2    +      -       -      +
     86A  GLN*     3.5    11.4    -      -       -      +
     87A  HIS      3.2     0.6    -      -       -      -
     88A  ARG*     1.3    76.4    -      -       -      +
     90A  MET*     1.3    67.1    +      -       -      +
     92A  GLY*     3.5     7.8    +      -       -      -
     94A  SER*     3.4    18.4    +      -       -      +
     95A  GLY*     4.2     8.5    -      -       -      -
     96A  ILE      3.5    19.1    -      -       -      +
     97A  ASN*     3.3    56.2    -      -       +      +
     98A  PRO*     3.9     6.5    -      -       +      -
     51B  VAL*     3.8    32.7    -      -       +      +
     52B  PHE*     3.6    33.1    -      +       -      -
     81B  GLU*     5.6     2.2    +      -       -      -
    185B  ILE*     5.9     4.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31A  VAL      3.5    25.6    -      -       -      +
     32A  THR*     3.9     1.1    -      -       -      -
     33A  SER*     3.5    33.9    -      -       -      +
     36A  LEU*     3.9    13.2    -      -       -      -
     86A  GLN*     3.1    31.7    +      -       -      +
     87A  HIS*     2.9     7.6    +      -       -      +
     89A  TYR*     1.3    77.2    -      -       +      +
     91A  THR*     1.3    63.5    +      -       -      +
     92A  GLY      3.2     1.4    +      -       -      -
    102A  PRO*     3.7    19.5    -      -       +      -
     51B  VAL*     4.2    15.9    -      -       +      +
     52B  PHE*     3.8    11.2    -      -       +      -
     74B  GLU*     5.1    11.9    -      -       +      +
     76B  SER*     3.5    22.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33A  SER*     4.5     7.1    -      -       -      -
     87A  HIS*     2.8    45.0    +      -       +      -
     88A  ARG*     3.9     4.7    -      -       -      -
     90A  MET*     1.3    76.4    -      -       -      +
     92A  GLY*     1.3    56.8    +      -       -      +
     93A  ALA*     3.3    13.5    -      -       +      +
     76B  SER*     4.7     7.1    +      -       -      -
----------------------------------------------------------
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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