Sequence alignment between 9is4(m) and UniProt seq P92277 (PSBM_CHLRE):

P92277 (PSBM_CHLRE): Photosystem II reaction center protein M from Chlamydomonas reinhardtii 
                 10        20        30    
         ---------+---------+---------+----
UniProt: MEVNIYGLTATALFIIIPTSFLLILYVKTASTQD
PDB seq: ---NIYGLTATALFIIIPTSFLLILYVKTASTQ-
            ------+---------+---------+--- 
                 10        20        30