D8: a New Antimicrobial Peptide (IMAGE) University of Pittsburgh Caption D8 is an engineered antimicrobial peptide designed to have a helix structure. It has proven more effective than its experimental predecessor and traditional last-resort antibiotics at fighting drug-resistant bacteria in laboratory cell cultures and mice. Credit B. Deslouches/Pitt 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.