Intestinal Cells Release Enzyme-laden Vesicles (image) Rockefeller University Press Caption Intestinal cells release enzyme-laden vesicles into the gut lumen from the tips of their microvilli (red circles) through the action of the motor protein myosin-1a. These lumenal vesicles may function to process nutrients and protect against bacterial infection. Credit McConnell, R.E., et al. 2009. J. Cell Biol. doi:10.1083/jcb.200902147. Usage Restrictions Reporters may freely use these materials in news coverage, with the appropriate credit information. 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.