PD Protein Gums up Cell Garbage Disposal System (image) University of Pennsylvania School of Medicine Share Print E-Mail Caption This shows lewy bodies. Brown spots are immunostaining using an antibody specifically recognizing an abnormal form of alpha-synuclein. Credit Kelvin C. Luk, Ph.D., Perelman School of Medicine, University of Pennsylvania 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.