ID 2.1.1.130 DE precorrin-2 C(20)-methyltransferase. AN precorrin-2 C20-methyltransferase. AN S-adenosyl-L-methionine--precorrin-2 methyltransferase. CA precorrin-2 + S-adenosyl-L-methionine = H(+) + precorrin-3A + S-adenosyl- CA L-homocysteine. CC -!- This enzyme participates in the aerobic (late cobalt insertion) CC cobalamin biosynthesis pathway. CC -!- See EC 2.1.1.151 for the equivalent enzyme that participates in the CC anaerobic cobalamin biosynthesis pathway. DR P66878, COBIJ_MYCBO; P9WGB2, COBIJ_MYCTO; P9WGB3, COBIJ_MYCTU; DR Q9HZU3, COBI_PSEAE ; P21639, COBI_SINSX ; //