3.1.3.22 ? x * 82000, calculated from sequence 3.1.3.22 ? x * 94800, SDS-PAGE, fusion enzyme comprising a mannitol-1-phosphate dehydrogenase and a mannitol-1-phosphatase 3.1.3.22 homotetramer 4 * 36000, calculated from amino acid sequence 3.1.3.22 monomer SDS-PAGE and western blot analysis 3.1.3.22 monomer 1 * 30200, SDS-PAGE