Drosophila Larva (IMAGE) University of Münster Caption Drosophila larva (with the head turned to the left). The surrounding glial cells in the peripheral nervous system have been depicted in individual colours by using a genetic trick. To this end, a random combination of a certain set of fluorescent proteins is induced in the surrounding glial cells by means of a systematic expression of a recombinase so that each cell expresses its own colour code and, as a result, becomes visible under the microscope. Credit Klämbt Lab Usage Restrictions None 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.