2V50 THE MISSING PART OF THE BACTERIAL MEXAB-OPRM SYSTEM: STRUCTURAL DETERMINATION OF THE MULTIDRUG EXPORTER MEXB MEMBRANE PROTEIN, MULTIDRUG RESISTANCE PROTEIN, DDM, RND, MEMBRANE, DETERGENT, TRANSPORT, CELL MEMBRANE, TRANSMEMBRANE, CELL INNER MEMBRANE, ANTIBIOTIC RESISTANCE, DRUG-EFFLUX PUMP, TRANSPORT PROTEIN