3L4M OXIDOREDUCTASE/ELECTRON TRANSPORT, MAUG, METHYLAMINE DEHYDROGENASE, QUINONE COFACTOR, TTQ, HIS- TYR HEME, ELECTRON TRANSPORT, C-HEME, IRON, METAL-BINDING, OXIDOREDUCTASE, PERIPLASM, PLASMID, TRANSPORT, DISULFIDE BOND, OXIDOREDUCTASE-ELECTRON TRANSPORT COMPLEX CRYSTAL STRUCTURE OF THE MAUG/PRE-METHYLAMINE DEHYDROGENASE COMPLEX.