Sequence alignment between 6hqb(D) and UniProt seq P19569 (PSAD_SYNY3):

P19569 (PSAD_SYNY3): Photosystem I reaction center subunit II from Synechocystis sp. (strain ATCC 27184 / PCC 6803 / Kazusa)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140 
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-
UniProt: MTELSGQPPKFGGSTGGLLSKANREEKYAITWTSASEQVFEMPTGGAAIMNEGENLLYLARKEQCLALGTQLRTKFKPKIQDYKIYRVYPSGEVQYLHPADGVFPEKVNEGREAQGTKTRRIGQNPEPVTIKFSGKAPYEV
PDB seq: MTELSGQPPKFGGSTGGLLSKANREEKYAITWTSASEQVFEMPTGGAAIMNEGENLLYLARKEQCLALGTQLRTKFKPKIQDYKIYRVYPSGEVQYLHPADGVFPEKVNEGREAQGTKTRRIGQNPEPVTIKFSGKAPYEV
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140