Sequence alignment between 2wsf(J) and UniProt seq P17230 (PSAJ_SPIOL):

P17230 (PSAJ_SPIOL): Photosystem I reaction center subunit IX from Spinacia oleracea 
                 10        20        30        40    
         ---------+---------+---------+---------+----
UniProt: MRDFKTYLSVAPVLSTLWFGSLAGLLIEINRFFPDALTFPFFSF
PDB seq: MRDFKTYLSVAPVLSTLWFGSLAGLLIEINRFFPDALTFPFF--
         ---------+---------+---------+---------+--  
                 10        20        30        40