Coomassie blue-stained gels after SDS-PAGE of cell extracts of strain CC495 grown on CH3Cl, CH3Cl-methylamine, or methylamine. Lanes 1, 2, and 3 contain 2.5 μg protein of extracts from cells grown on CH3Cl, CH3Cl-methylamine, and methylamine, respectively. Lane 4 contains protein standards with molecular masses (in kilodaltons) as indicated.