Microbial Aggregate (IMAGE) Penn State Caption This is a microbial aggregate found in manganese incubations stained using 4', 6-diamidino-2-phenylindole (DAPI). The scale bar on the image is 5 microns. Credit Emily Beal Usage Restrictions Non-commercial use 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.