Sequence alignment between 1a57(A) and UniProt seq P02693 (FABPI_RAT):

P02693 (FABPI_RAT): Fatty acid-binding protein, intestinal from Rattus norvegicus
                 10        20        30        40        50        60        70        80        90       100       110       120       130  
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
UniProt: MAFDGTWKVDRNENYEKFMEKMGINVVKRKLGAHDNLKLTITQEGNKFTVKESSNFRNIDVVFELGVDFAYSLADGTELTGTWTMEGNKLVGKFKRVDNGKELIAVREISGNELIQTYTYEGVEAKRIFKKE
         ...............XXXXXXXXXXXXXXXX.....................................................................................................
PDB seq: -AFDGTWKVDRNENYS---------------GAHDNLKLTITQEGNKFTVKESSNFRNIDVVFELGVDFAYSLADGTELTGTWTMEGNKLVGKFKRVDNGKELIAVREISGNELIQTYTYEGVEAKRIFKKE
          ---------+-----               ----+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
                  10                       20        30        40        50        60        70        80        90       100       110