Sequence alignment between 4b2c(B) and UniProt seq P01051 (ICIC_HIRME):

P01051 (ICIC_HIRME): Eglin C from Hirudo medicinalis
                  10        20        30        40        50        60        70
         ---------+---------+---------+---------+---------+---------+---------+
UniProt: -TEFGSELKSFPEVVGKTVDQAREYFTLHYPQYDVYFLPEGSPVTLDLRYNRVRVFYNPGTNVVNHVPHVG
         .............................................X.........................
PDB seq: GTEFGSELKSFPEVVGKTVDQAREYFTLHYPQYDVYFLPEGSPVTKDLRYNRVRVFYNPGTNVVNHVPHVG
         ----------+---------+---------+---------+---------+---------+---------+
                  10        20        30        40        50        60        70