Mass Spectrometry (IMAGE) University of Pittsburgh Caption Yi Shi, Ph.D., operates his mass spectrometry machine to analyze 10's of millions of nanobodies pulled from llama blood. Credit UPMC 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.