Male Flies (IMAGE) Penn State Caption The wild-type male flies in the absence (left) or presence (right) of ethanol vapor in the Flypub experimental chamber. Bottom: The transgenic TH-GAL4/UAS-Shits male flies with (left) or without (right) dopamine neuronal activities during ethanol exposure. Credit Hyun-Gwan Lee, Penn State. 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.