APOL3 (IMAGE) Howard Hughes Medical Institute Caption Before killing Salmonella, the detergent-like protein APOL3 (green) must get through the bacteria's protective outer membrane (red), as shown in the cross sections above. Credit R. Gaudet et al./Science 2021 Usage Restrictions Must use credit. 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.