The gut patrol (IMAGE) La Jolla Institute for Immunology Caption This image captures intraepithelial T cells (blue dots) and collagen in the basement membrane (green). This view shows how the cells and the basement membrane are connected. The black space is not empty--it is filled with cells in the intestinal villus, but they were not labeled with fluorescent antibodies so they do not show up. Credit LJI Microscopy Core Usage Restrictions Credit must be given to the creator. License CC BY 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.