Sequence alignment between 2pyp(A) and UniProt seq P16113 (PYP_HALHA):

P16113 (PYP_HALHA): Photoactive yellow protein from Halorhodospira halophila
                 10        20        30        40        50        60        70        80        90       100       110       120     
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-----
UniProt: MEHVAFGSEDIENTLAKMDDGQLDGLAFGAIQLDGDGNILQYNAAEGDITGRDPKQVIGKNFFKDVAPCTDSPEFYGKFKEGVASGNLNTMFEYTFDYQMTPTKVKVHMKKALSGDSYWVFVKRV
         ....................................................................X........................................................
PDB seq: MEHVAFGSEDIENTLAKMDDGQLDGLAFGAIQLDGDGNILQYNAAEGDITGRDPKQVIGKNFFKDVAPXTDSPEFYGKFKEGVASGNLNTMFEYTFDYQMTPTKVKVHMKKALSGDSYWVFVKRV
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-----
                 10        20        30        40        50        60        70        80        90       100       110       120