Efflux Pumps (IMAGE) DOE/Los Alamos National Laboratory Caption Bacterial efflux pumps, such as the P. aeruginosa MexAB-OprM pump shown here, are one of the dominant molecular mechanisms available to Gram-negative pathogens for removing toxins, including antibiotics. Inactivation of the pump assembly and function would be a major step for reducing bacterial multidrug resistance. Credit LANL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.