Cleaning of the Outer Membrane by MlaA (IMAGE) Newcastle University Caption MlaA, which in the cell is bound to another outer membrane protein called a porin, removes outer leaflet phospholipids and functions like a membrane vacuum cleaner that maintains the important outer membrane permeability barrier Credit Bert van den Berg, Newcastle University Usage Restrictions only in connection with this research story 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.