1BJO:
reference: Crystal structure of phosphoserine aminotransferase from Escherichia coli at 2.3 A resolution: comparison of the unligated enzyme and a complex with alpha-methyl-l-glutamate., Hester G, Stark W, Moser M, Kallen J, Markovic-Housley Z, Jansonius JN, J Mol Biol 1999 Feb 26;286(3):829-50. PMID: 10024454

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