Any of the intermediates in the biosynthesis of vitamin B12 from uroporphyrinogen III that lie on the pathway before the formation of the first corrin macrocycle. The figure after 'precorrin' corresponds to the number of C-methyl groups introduced into the tetrapyrrole framework.
Stars
This entity has been manually annotated by the ChEBI Team.
An organic molecule or ion (usually a metal ion) that is required by an enzyme for its activity. It may be attached either loosely (coenzyme) or tightly (prosthetic group).
