Sequence alignment between 1c09(A) and UniProt seq P00268 (RUBR_CLOPA):

P00268 (RUBR_CLOPA): Rubredoxin from Clostridium pasteurianum 
                 10        20        30        40        50    
         ---------+---------+---------+---------+---------+----
UniProt: MKKYTCTVCGYIYNPEDGDPDNGVNPGTDFKDIPDDWVCPLCGVGKDQFEEVEE
         ...........................................X..........
PDB seq: MKKYTCTVCGYIYNPEDGDPDNGVNPGTDFKDIPDDWVCPLCGAGKDQFEEVE-
         ---------+---------+---------+---------+---------+--- 
                 10        20        30        40        50