Duane Grandgenett, Saint Louis University (IMAGE) Saint Louis University Caption Duane Grandgenett, Ph.D., professor at Saint Louis University's Institute of Molecular Virology, discovered integrase in 1978. 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.