Biosensor (IMAGE) University of California - Berkeley Caption Yeast cells producing the yellow beet pigment betaxanthin, which UC Berkeley researchers used to quickly identify key enzymes in the production of benzylisoquinoline alkaloids (BIAs). BIAs are the metabolites in the poppy plant that could lead to morphine, antibiotics and other pharmaceutical agents. Credit William DeLoache/UC Berkeley Usage Restrictions Editorial use with coverage of research findings permitted. Must include credit. Commercial use prohibited. 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.