2VGU:
reference: Structure determination and biochemical studies on Bacillus stearothermophilus E53Q serine hydroxymethyltransferase and its complexes provide insights on function and enzyme memory., Rajaram V, Bhavani BS, Kaul P, Prakash V, Appaji Rao N, Savithri HS, Murthy MR, FEBS J. 2007 Aug;274(16):4148-60. Epub 2007 Jul 25. PMID: 17651438

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