Sequence alignment between 4ar5(A) and UniProt seq P24297 (RUBR_PYRFU):

P24297 (RUBR_PYRFU): Rubredoxin from Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1) 
                 10        20        30        40        50    
         ---------+---------+---------+---------+---------+----
UniProt: MAKWVCKICGYIYDEDAGDPDNGISPGTKFEELPDDWVCPICGAPKSEFEKLED
PDB seq: MAKWVCKICGYIYDEDAGDPDNGISPGTKFEELPDDWVCPICGAPKSEFEKLED
         ----------+---------+---------+---------+---------+---
                  10        20        30        40        50