Sequence alignment between 1b7n(A) and UniProt seq P61626 (LYSC_HUMAN):

P61626 (LYSC_HUMAN): Lysozyme C from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MKALIVLGLVLLSVTVQGKVFERCELARTLKRLGMDGYRGISLANWMCLAKWESGYNTRATNYNAGDRSTDYGIFQINSRYWCNDGKTPGAVNACHLSCSALLQDNIADAVACAKRVVRDPQGIRAWVAWRNRCQNRDVRQYVQGCGV
         ....................................................X...............................................................................................
PDB seq: ------------------KVFERCELARTLKRLGMDGYRGISLANWMCLAKWLSGYNTRATNYNAGDRSTDYGIFQINSRYWCNDGKTPGAVNACHLSCSALLQDNIADAVACAKRVVRDPQGIRAWVAWRNRCQNRDVRQYVQGCGV
                           ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
                                   10        20        30        40        50        60        70        80        90       100       110       120       130