ID 2.1.1.271 DE cobalt-precorrin-4 methyltransferase. CA Co-precorrin-4 + S-adenosyl-L-methionine = Co-precorrin-5A + H(+) + CA S-adenosyl-L-homocysteine. CC -!- This enzyme, which participates in the anaerobic (early cobalt CC insertion) cobalamin biosynthesis pathway, catalyzes the methylation CC of C-11 in cobalt-precorrin-4 to form cobalt-precorrin-5A. CC -!- See EC 2.1.1.133 for the equivalent enzyme that participates in the CC aerobic cobalamin biosynthesis pathway. DR Q58973, CBIF_METJA ; O87696, CBIF_PRIMG ; P0A2H0, CBIF_SALTI ; DR P0A2G9, CBIF_SALTY ; //