Image (image) NIH/National Eye Institute Share Print E-Mail Caption Left: A fruit fly showing location of brain pacemaker cells that express rhodopsin 7. Right: Depiction of rhodopsin 7 molecular structure. Credit Craig Montell Usage Restrictions None Share Print E-Mail 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.