Sequence alignment between 9is4(H) and UniProt seq P22666 (PSBH_CHLRE):

P22666 (PSBH_CHLRE): Photosystem II reaction center protein H from Chlamydomonas reinhardtii
                 10        20        30        40        50        60        70        80        
         ---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MATGTSKAKPSKVNSDFQEPGLVTPLGTLLRPLNSEAGKVLPGWGTTVLMAVFILLFAAFLLIILEIYNSSLILDDVSMSWETLAKVS
PDB seq: ------------------EPGLVTPLGTLLRPLNSEAGKVLPGWGTTVLMAVFILLFAAFLLIILEIYNSSLILDDVSMSWETLAK--
                           -+---------+---------+---------+---------+---------+---------+------  
                           20        30        40        50        60        70        80