loop_
    _nef_sequence.index
    _nef_sequence.chain_code
    _nef_sequence.sequence_code
    _nef_sequence.residue_name
    _nef_sequence.linking
    _nef_sequence.residue_variant
    _nef_sequence.cis_peptide

  # key: chain_code, sequence_code

           1  A  13   ALA  start      .            .
           2  A  14   TRP  middle     .            .
           3  A  15   GLY  middle     .            .
           4  A  16   ASN  middle     .            .
           5  A  17   VAL  middle     .            .
           6  A  18   PHE  middle     .            .
           7  A  19   LEU  middle     .            .
           8  A  20   CYS  middle     -HD          .
           9  A  21   ALA  middle     .            .
          10  A  22   THR  middle     .            .
          11  A  23   LYS  middle     .            .
          12  A  24   ASP  middle     .            .
          13  A  24B  GLN  middle     .            .
          14  A  24C  GLN  middle     .            .
          15  A  24D  TYR  middle     .            .
          16  A  25   HIS  end        -HD1,+HE2    .
          17  B  17   CYS  single     -HD          .
          18  C  1    GLY  cyclic     .            .
          19  C  2    PRO  middle     .            true
          20  C  3    ASP  middle     .            .
          21  C  4    GLY  middle     .            .
          22  C  5    PRO  middle     .            .
          23  C  6    ASP  cyclic     .            .
          24  D -3    TNSR dummy      .            .
          25  D -2    LL2  dummy      .            .
          26  D -1    LL1  dummy      .            .
          27  D  0    LL   dummy      .            .
          28  D  1    ALA  .          .            .
          29  D  2    CYS  .          -HD          .
          30  D  3    GLY  .          .            .
          31  D  4    CYS  .          -HD          .
          32  D  5    VAL  .          .            .
          33  D  6    CYS  .          -HD          .
          34  D  7    PHE  .          .            .
          35  D  8    CYS  .          -HD          .
          36  D  9    ASN  .          .            .
          37  E  1    ASN  middle     .            .
          38  E  2    THR  middle     -HG1,-OG1    .
          39  E  3    ALA  middle     .            .
          40  E  4    PRO  middle     .            .
          41  E  5    ALA  middle     .            .
          42  E  6    GLU  middle     -OE2         .
          43  E  7    SER  middle     .            .
          44  E  8    GLN  middle     .            .
          45  E  9    GLU  middle     .            .
          46  E  10   HIS  middle     .            .
          47  E  11   HIS  middle     .            .
          48  E  12   CYS  middle     .            .
          49  E  13   LYS  middle     .            .
          50  E  14   ARG  middle     .            .
          51  E  15   MOH  single     -HO          .
          52  E  16   GLC  single     -HO1         .
          53  F   1   GLY  start      .            .
          54  F   2   ILE  middle     .            .
          55  F   3   SER  middle     .            .
          56  F   4   THR  break      .            .
          57  F  11   ASN  middle     .            .
          58  F  12   SER  end        .            .
          59  G   3   TYR  middle     .            .
          60  G   4   GLY  middle     .            .
          61  G   5   ALA  middle     .            .
  stop_
  
# The first column (index) is a consecutive line number that does not persist  
# when data are re-exported. It is there only to store the order that the lines
# are givn inthe file (which is significant for specifying the sequence).
#
# Chain A is a linear hexadecapeptide (13-25), disulfide linked to a free cysteine (chain B)
# HIS 25 is protonated on NE2 rather than ND1 (and deprotonated on the C terminated carboxyl).
#
# Chain C is a cyclic hexapeptide, containing a cis-peptide bond at PRO 2.
#
# Chain D is a nonapeptide, defined with dangling ends (as might for instance be used
# for CYANA). It contains two disulfide bonds, 2-6 and 4-8 - the connections are shown 
# in the _nef_covalent_links loop. Four additional dummy residues have been added at the
# N-terminal, three linker residues and a tensor-origin residue ('TNSR').
# Note that there is NO sequential link between chains D and E, even though both have
# dangling ends. Interchain links must always be given explictly in the _nef_covalent_links loop.
#
# Chain E has an amide bond between the backbone N of ASN 1 and the side chain carboxylate
# of GLU 6, and a methyl ester cap.
#
# Chains F and G represent a chimeric protein, where (part of) chain G has been
# inserted into chain F while maintaining the original numbering. Each chain is given as a
# single block of residues, with the 'break' preceding a chain gap, and the 
# nef_covalent_links loop to show the additional sequential links.

• _nef_sequence.chain_code
• _nef_sequence.sequence_code
• _nef_sequence.cis_peptide
• _nef_sequence.index
• _nef_sequence.linking
• _nef_sequence.residue_name
• _nef_sequence.residue_variant