SCHEDULED MAINTENANCE
6,7-Dimethyl-10-[1′-14C]formylmethylisoalloxazine was added to growing cultures of Propionibacterium shermanii; the vitamin B12 subsequently isolated was found to be 14C-labelled exclusively in the C-2 carbon of the 5,6-dimethylbenzimidazole unit.
M. H. Kay, C. Radford and W. L. Alworth, J. Chem. Soc., Chem. Commun., 1978, 22 DOI: 10.1039/C39780000022
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