Microbial Efflux Pumps (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption Microbial production of biofuels from cellulose can be enhanced with the use of efflux pumps to export toxic fuels from the microbes. Credit Image courtesy of Aindrila Mukhopadhyay 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.