Sequence alignment between 5kaf(K) and UniProt seq Q9F1K9 (PSBK_THEEB):

Q9F1K9 (PSBK_THEEB): Photosystem II reaction center protein K from Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1) 
                 10        20        30        40      
         ---------+---------+---------+---------+------
UniProt: MIDALVLVAKLPEAYAIFDPLVDVLPVIPVLFLALAFVWQAAVGFR
PDB seq: ---------KLPEAYAIFDPLVDVLPVIPVLFLALAFVWQAAVGFR
                  +---------+---------+---------+------
                 10        20        30        40