1ZYN:
reference: Oxidized and synchrotron cleaved structures of the disulfide redox center in the N-terminal domain of Salmonella typhimurium AhpF., Roberts BR, Wood ZA, Jonsson TJ, Poole LB, Karplus PA, Protein Sci 2005 Sep;14(9):2414-20. PMID: 16131664

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