Nervous System Transgenicpolyp (IMAGE) University of Vienna Caption Close-up of nervous system of a transgenic polyp of the sea anemone Nematostella vectensis, in which a red fluorescent reporter gene (mCherry) is driven by the regulatory sequence of the neuronal ELAV gene. The picture shows the diffuse structure of the nervous system, but also reveals the accumulation of longitudinal axonal tracts along the eight gastric tissue folds (mesenteries). Credit Copyright: U. Technau 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.