#959 PDB ATOM column 27 (insertions) ignored for translation to sequence

[Steffen Möller]

http://www.wwpdb.org/documentation/file-format-content/format33/sect9.html#ATOM
When two consecutive ATOM rows are equal in their residue type and in their residue number but differ in their insertion code, then these are treated as belonging ot the same residue. For instance

ATOM    422  N   SER L  30      54.838  18.500  47.837  1.00  0.00           N
ATOM    423  CA  SER L  30      53.494  18.162  48.273  1.00  0.00           C
ATOM    424  C   SER L  30      52.725  17.364  47.221  1.00  0.00           C
ATOM    425  O   SER L  30      52.723  17.697  46.056  1.00  0.00           O
ATOM    426  CB  SER L  30      52.734  19.429  48.610  1.00  0.00           C
ATOM    427  OG  SER L  30      51.403  19.143  48.941  1.00  0.00           O
ATOM    428  H   SER L  30      55.100  19.472  47.757  1.00  0.00           H
ATOM    429  HA  SER L  30      53.471  17.585  49.199  1.00  0.00           H
ATOM    430 1HB  SER L  30      53.219  19.934  49.445  1.00  0.00           H
ATOM    431 2HB  SER L  30      52.761  20.107  47.758  1.00  0.00           H
ATOM    432  HG  SER L  30      50.919  19.965  48.828  1.00  0.00           H
ATOM    433  N   SER L  30A     52.170  16.303  47.698  1.00  0.00           N
ATOM    434  CA  SER L  30A     51.329  15.409  46.920  1.00  0.00           C
ATOM    435  C   SER L  30A     52.015  14.812  45.685  1.00  0.00           C
ATOM    436  O   SER L  30A     51.350  14.366  44.764  1.00  0.00           O
ATOM    437  CB  SER L  30A     50.082  16.156  46.488  1.00  0.00           C
ATOM    438  OG  SER L  30A     49.348  16.592  47.599  1.00  0.00           O
ATOM    439  H   SER L  30A     52.421  16.046  48.642  1.00  0.00           H
ATOM    440  HA  SER L  30A     50.943  14.567  47.497  1.00  0.00           H
ATOM    441 1HB  SER L  30A     50.364  17.013  45.876  1.00  0.00           H
ATOM    442 2HB  SER L  30A     49.463  15.505  45.873  1.00  0.00           H
ATOM    443  HG  SER L  30A     49.931  17.176  48.090  1.00  0.00           H
ATOM    444  N   SER L  31      53.347  14.792  45.683  1.00  0.00           N
ATOM    445  CA  SER L  31      54.094  14.259  44.549  1.00  0.00           C
ATOM    446  C   SER L  31      53.734  14.959  43.242  1.00  0.00           C
ATOM    447  O   SER L  31      53.703  14.356  42.179  1.00  0.00           O
ATOM    448  CB  SER L  31      53.835  12.771  44.418  1.00  0.00           C
ATOM    449  OG  SER L  31      54.240  12.087  45.572  1.00  0.00           O
ATOM    450  H   SER L  31      53.852  15.150  46.480  1.00  0.00           H
ATOM    451  HA  SER L  31      55.175  14.292  44.689  1.00  0.00           H
ATOM    452 1HB  SER L  31      52.774  12.600  44.243  1.00  0.00           H
ATOM    453 2HB  SER L  31      54.375  12.383  43.555  1.00  0.00           H
ATOM    454  HG  SER L  31      53.773  11.248  45.560  1.00  0.00           H

is intepreted as just two conscutive Serines.