Redeye Gene Receptor (image) University of Pennsylvania School of Medicine Caption This is an alpha subunit of the nicotinic acetylcholine receptor accounts for the rye mutant phenotype. Expression pattern of redeye (green). Credit Amita Sehgal and Mi Shi, PhD, Perelman School of Medicine, University of Pennsylvania; eLife Usage Restrictions None 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.