SLU Scientist Yuna Ayala, Ph.D. (IMAGE) Saint Louis University Caption Saint Louis University assistant professor of biochemistry and molecular biology Yuna Ayala, Ph.D., (center) and members of her research team. Credit Saint Louis 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.