title: Stereochemistry of methyl group insertion in corrinoid biosynthesis. Determination of carbon isotope chirality by 13C nuclear magnetic resonance.
mesh_terms: D002247:Carbon Isotopes; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D011166:Porphyrins / Q000096:biosynthesis*; D011424:Propionibacterium / Q000378:metabolism; D012436:S-Adenosylmethionine / Q000378:metabolism; D013237:Stereoisomerism; D014805:Vitamin B 12 / Q000096:biosynthesis*
chemical_list: D002247:Carbon Isotopes; D011166:Porphyrins; D012436:S-Adenosylmethionine; D014805:Vitamin B 12