Sequence alignment between 2kyc(A) and UniProt seq P43305 (PRVU_CHICK):

P43305 (PRVU_CHICK): Parvalbumin, thymic CPV3 from Gallus gallus
                 10        20        30        40        50        60        70        80        90       100         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MSLTDILSPSDIAAALRDCQAPDSFSPKKFFQISGMSKKSSSQLKEIFRILDNDQSGFIEEDELKYFLQRFECGARVLTASETKTFLAAADHDGDGKIGAEEFQEMVQS
         ........................................................................X....................................
PDB seq: -SLTDILSPSDIAAALRDCQAPDSFSPKKFFQISGMSKKSSSQLKEIFRILDNDQSGFIEEDELKYFLQRFESGARVLTASETKTFLAAADHDGDGKIGAEEFQEMVQS
          ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
                  10        20        30        40        50        60        70        80        90       100