Sequence alignment between 4jcb(S) and UniProt seq Q3J1A3 (LHB1_RHOS4):

Q3J1A3 (LHB1_RHOS4): Light-harvesting protein B-875 beta chain OS=Rhodobacter sphaeroides (strain ATCC 17023 / 2.4.1 / NCIB 8253 / DSM 158) GN=pufB PE=1 SV=3 
                 10        20        30        40         
         ---------+---------+---------+---------+---------
UniProt: MADKSDLGYTGLTDEQAQELHSVYMSGLWLFSAVAIVAHLAVYIWRPWF
PDB seq: -ADKSDLGYTGLTDEQAQELHSVYMSGLWLFSAVAIVAHLAVYIWRPWF
          ---------+---------+---------+---------+--------
                  10        20        30        40