Sequence alignment between 3a0b(H) and UniProt seq P19052 (PSBH_THEVL):

P19052 (PSBH_THEVL): Photosystem II reaction center protein H (Fragment) from Thermostichus vulcanus 
                 10        20        30        40        50        60     
         ---------+---------+---------+---------+---------+---------+-----
UniProt: ARRTWLGDILRPLNSEYGKVAPGWGTTPLMAVFMGLFLVFLLIILEIYNSTLILDGVNVSWKALG
PDB seq: ARRTWLGDILRPLNSEYGKVAPGWGTTPLMAVFMGLFLVFLLIILEIYNSTLILDGVNVSWKAL-
         --------+---------+---------+---------+---------+---------+----- 
                10        20        30        40        50        60