label: cobalt-precorrin-3 C17-methyltransferase activity
label_lc: cobalt-precorrin-3 c17-methyltransferase activity
description: "Catalysis of the reaction: cobalt-precorrin 3 + S-adenosyl-L-methionine = cobalt-precorrin 4 + S-adenosyl-L-homocysteine."