Evolution of Efflux Pumps (IMAGE) University of Kansas Caption Photo illustration on evolution of efflux pumps with the background of cave paintings Credit Photo illustration courtesy Batika Saxena, Grafika Labs. 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.