Scarred Kidney Filtering cells (IMAGE) University of Pennsylvania School of Medicine Caption Representative images of kidney tissue from APOL1-G1 and APOL1-G2 mice, showing severe scarring of the kidney filter. Credit Katalin Susztak, Perelman School of Medicine, University of Pennsylvania 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.