Fluorescent probes (IMAGE) Washington University in St. Louis Caption Fluorescent probes emit light as they briefly attached to, then detach from, a cell membrane. Credit Washington University in St. Louis Usage Restrictions Use allowed with proper attributions 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.