Sequence alignment between 3bz2(K) and UniProt seq Q9F1K9 (PSBK_THEEB):

Q9F1K9 (PSBK_THEEB): Photosystem II reaction center protein K from Thermosynechococcus elongatus (strain BP-1) 
                 10        20        30        40      
         ---------+---------+---------+---------+------
UniProt: MIDALVLVAKLPEAYAIFDPLVDVLPVIPVLFLALAFVWQAAVGFR
PDB seq: ---------KLPEAYAIFDPLVDVLPVIPVLFLALAFVWQAAVGFR
                  +---------+---------+---------+------
                 10        20        30        40