Edward Yu, Iowa State University (IMAGE) Iowa State University Caption Edward Yu of Iowa State University and the Ames Laboratory uses a laboratory microscope to inspect the size and shape of protein crystals. Credit Photo by Bob Elbert/Iowa State University 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.