2E0K:
reference: Crystal structures of CbiL, a methyltransferase involved in anaerobic vitamin B biosynthesis, and CbiL in complex with S-adenosylhomocysteine--implications for the reaction mechanism., Wada K, Harada J, Yaeda Y, Tamiaki H, Oh-Oka H, Fukuyama K, FEBS J. 2007 Jan;274(2):563-73. PMID: 17229157

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