Mutually Assured Cleanup (IMAGE) University of Massachusetts Amherst Caption Biochemists at UMass Amherst recently revealed how two proteins shelter each other in "mutually assured cleanup" to insure that cell division proceeds smoothly. Credit Peter Chien, UMass Amherst 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.