Sequence alignment between 3a0b(J) and UniProt seq Q7DGD4 (PSBJ_THEVL):

Q7DGD4 (PSBJ_THEVL): Photosystem II reaction center protein J from Thermostichus vulcanus 
                 10        20        30        40
         ---------+---------+---------+---------+
UniProt: MMSEGGRIPLWIVATVAGMGVIVIVGLFFYGAYAGLGSSL
PDB seq: ------RIPLWIVATVAGMGVIVIVGLFFYGAYAGLGSSL
               ---+---------+---------+---------+
                 10        20        30        40