Microglia cells producing engineered receptors. (IMAGE) Institute of Science and Technology Austria Caption Rouven Schulz made microglia cells – part of the immune system in the brain – produce a certain G protein-coupled receptor (GPCR) by infecting it with a specially designed virus from ISTA’s Virus Services. By applying an immunofluorescence staining (magenta), he made the receptors on the cell surface visible. He also colored the cell nuclei blue with another dye. Credit © Rouven Schulz / ISTA Usage Restrictions - License Original 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.