RT Journal Article SR Electronic(1) A1 Rahat, M. A1 Reich, K.YR 1963 T1 The B12 Vitamins and Growth of the Flagellate Prymnesium parvum JF Microbiology, VO 31 IS 2 SP 195 OP 202 DO https://doi.org/10.1099/00221287-31-2-195 PB Microbiology Society, SN 1465-2080, AB SUMMARY Vitamin B12 is an essential nutrient for the flagellate Prymnesium parvum when growing in axenic culture and apparently can be replaced only by a few related ‘incomplete’ analogues, i.e. only those devoid of one or both benzimidazole-methyl groups; and, of the substituted analogues, some (e.g. the mono-acid, the dicarboxylic acid and the ethylamide of B12) can replace vitamin B12, but some others of this group, e.g. pseudovitamin B12, 2-methylmercaptoadenine cobamide, the ethylamide mono-acid, methylamide and anilide of the vitamin B12, act as competitive inhibitors of the growth of P. parvum. , UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-31-2-195