1CAA:
reference: X-ray crystal structures of the oxidized and reduced forms of the rubredoxin from the marine hyperthermophilic archaebacterium Pyrococcus furiosus., Day MW, Hsu BT, Joshua-Tor L, Park JB, Zhou ZH, Adams MW, Rees DC, Protein Sci 1992 Nov;1(11):1494-507. PMID: 1303768

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