Sequence alignment between 6v1c(A) and UniProt seq Q07654 (TFF3_HUMAN):

Q07654 (TFF3_HUMAN): Trefoil factor 3 from Homo sapiens
                 10        20        30        40        50        60        70        80
         ---------+---------+---------+---------+---------+---------+---------+---------+
UniProt: MAARALCMLGLVLALLSSSSAEEYVGLSANQCAVPAKDRVDCGYPHVTPKECNNRGCCFDSRIPGVPWCFKPLQEAECTF
         ....................................X............X....................X.........
PDB seq: ------------------------VGLSANQCAVPAXDRVDCGYPHVTPXECNNRGCCFDSRIPGVPWCFXPLQEAE---
                                 ------+---------+---------+---------+---------+------   
                                      10        20        30        40        50