Term Name:	precorrin-3B C17-methyltransferase activity
Synonyms:	CobJ, precorrin-3 methylase activity, precorrin-3 methyltransferase activity, S-adenosyl-L-methionine:precorrin-3B C17-methyltransferase activity
Definition:	Catalysis of the reaction: S-adenosyl-L-methionine + precorrin-3B = S-adenosyl-L-homocysteine + precorrin 4.
Ontology:	GO: Molecular Function [GO:0030789]    QuickGO    AmiGO