1RZP:
reference: pH-profile crystal structure studies of C-terminal despentapeptide nitrite reductase from Achromobacter cycloclastes., Li HT, Wang C, Chang T, Chang WC, Liu MY, Le Gall J, Gui LL, Zhang JP, An XM, Chang WR, Biochem Biophys Res Commun 2004 Mar 26;316(1):107-13. PMID: 15003518

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