Sequence alignment between 3a0b(I) and UniProt seq P12240 (PSBI_THEVL):

P12240 (PSBI_THEVL): Photosystem II reaction center protein I from Thermostichus vulcanus 
                 10        20        30        
         ---------+---------+---------+--------
UniProt: METLKITVYIVVTFFVLLFVFGFLSGDPARNPKRKDLE
PDB seq: METLKITVYIVVTFFVLLFVFGFLSGDPARNPKRK---
         ---------+---------+---------+-----   
                 10        20        30