1A8L:
reference: A protein disulfide oxidoreductase from the archaeon Pyrococcus furiosus contains two thioredoxin fold units., Ren B, Tibbelin G, de Pascale D, Rossi M, Bartolucci S, Ladenstein R, Nat Struct Biol 1998 Jul;5(7):602-11. PMID: 9665175

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