Epithelial Tube Contraction (IMAGE) National University of Singapore Caption Loss of SPV-1 function in the spermathecal epithelial cell tube leads to unregulated contractility. Hyperactive actinmyosin contraction (blue rings) results in misshapen embryos (red). Video at mbi.nus.edu.sg/features/SPV-1 Credit Mechanobiology Institute, National University of Singapore Usage Restrictions Proper credits must be given 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.