Mouse Basophil (IMAGE) University of Pennsylvania School of Medicine Caption The bad boys in allergy: a computer-enhanced electron microscopic image of a mouse basophil. Credit Mario Noti, Elia Tait Wojno, David Artis and the UPenn Electron Microscopy Resource Laboratory 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.