Stained Kidney Sample (IMAGE) American Institute of Physics Caption This image shows a stained kidney sample imaged on a two-photon microscope with blue representing nuclei and red cytoplasm. Credit Cody Narciso and Victoria Zellmer/University of Notre Dame Usage Restrictions This image may be used only with appropriate caption and credit. 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.