1FG3:
reference: Crystal structure of histidinol phosphate aminotransferase (HisC) from Escherichia coli, and its covalent complex with pyridoxal-5'-phosphate and l-histidinol phosphate., Sivaraman J, Li Y, Larocque R, Schrag JD, Cygler M, Matte A, J Mol Biol 2001 Aug 24;311(4):761-76. PMID: 11518529

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