1FVJ:
reference: Structural analysis of three His32 mutants of DsbA: support for an electrostatic role of His32 in DsbA stability., Guddat LW, Bardwell JC, Glockshuber R, Huber-Wunderlich M, Zander T, Martin JL, Protein Sci 1997 Sep;6(9):1893-900. PMID: 9300489

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