Engels et al. supplemental fig 2 (IMAGE) PNAS Nexus Caption High resolution microscopy images of cells from the (A) Control, (B) Urban 125μg/mL, or (C) Urban 500μg/mL exposure conditions captured using a 60x objective. Actin (red), nuclei (blue), and the histone phosphorylation γH2AX (green). Each image is displayed with the same bit range to show the increase in intensity of γH2AX as PM exposure concentration increases. Credit Engels et al. Usage Restrictions None License Original 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.