Methyltransferase 2 may refer to: (Methyl-Co(III) methanol-specific corrinoid protein):coenzyme M methyltransferase (Methyl-Co(III) methylamine-specific corrinoid protein):coenzyme M methyltransferase (Methyl-Co(III) tetramethylammonium-specific corrinoid protein):coenzyme M methyltransferase