Rational Design (IMAGE) Brown University Caption Researchers have designed a new compound that inhibits a key enzyme in Mycobacterium tuberculosis, which makes the bacterium more susceptible to the human immune system. Credit Sello Lab / Brown 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.