Mouse Olfactory System (IMAGE) Cell Press Caption Red fluorescence represents super-sniffer receptors connecting to the brain in the mouse olfactory system while the green fluorescence marks all other odor receptor populations. Credit Courtesy of Paul Feinstein. Usage Restrictions Credit Required. 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.