Yang & McCall (IMAGE) University of Oklahoma Caption Zhibo Yang (right), an associate professor in the Department of Chemistry and Biochemistry at the University of Oklahoma, with and Laura-Isobel McCall (right), an associate professor of bioanalytical chemistry at San Diego State University, in the University of Oklahoma mass spectrometry lab. Credit Provided by the University of Oklahoma. 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.