Brain Tissue (IMAGE) Weizmann Institute of Science Caption This is brain tissue from genetically engineered mice. Neurons that express CRFR1 appear in green and those that release the neurotransmitter CRF are in red. The image was obtained with fluorescence microscopy Credit Weizmann Institute of Science 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.