1.14.13.83	precorrin-3A + NADH + H+ + O2	biosynthesis of vitamin B12	Pseudomonas denitrificans (nom. rej.) G3575	precorrin-3B + NAD+ + H2O	aerobic incubation with CobG alone, if CobJ and S-adenosyl-L-methionine are included the product is precorrin-4	ir	363718