Sequence alignment between 9is4(E) and UniProt seq P48268 (PSBE_CHLRE):

P48268 (PSBE_CHLRE): Cytochrome b559 subunit alpha from Chlamydomonas reinhardtii
                 10        20        30        40        50        60        70        80  
         ---------+---------+---------+---------+---------+---------+---------+---------+--
UniProt: MAGKPVERPFSDILTSIRYWVIHSITVPALFIAGWLFVSTGLAYDVFGTPRPNEYFTEDRQEAPLITDRFNALEQVKKLSGN
PDB seq: -------RPFSDILTSIRYWVIHSITVPALFIAGWLFVSTGLAYDVFGTPRPNEYFTEDRQEAPLITDRFNALEQVKKLSGN
                --+---------+---------+---------+---------+---------+---------+---------+--
                 10        20        30        40        50        60        70        80