Sequence alignment between 1jb0(K) and UniProt seq P0A425 (PSAK_THEEB):

P0A425 (PSAK_THEEB): Photosystem I reaction center subunit PsaK from Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1) 
                 10        20        30        40        50        60        70        80   
         ---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: MVLATLPDTTWTPSVGLVVILCNLFAIALGRYAIQSRGKGPGLPIALPALFEGFGLPELLATTSFGHLLAAGVVSGLQYAGAL
         ................................X..........XXXXXXXXXXX.............................
PDB seq: -------------------ILCNLFAIALGRY-IQSRGKGPGL-----------GLPELLATTSFGHLLAAGVVSGL------
                            +---------+-- ------+---           -----+---------+-------      
                           20        30        40                  60        70