PcaV-Protocatechuate Complex (image) Brown University Caption Researchers from Brown University unlocked the genetic and molecular mechanisms that enable Streptomyces bacteria to break down lignin, a component of plant biomass. The lignin-derived compound protocatechuate binds to a genetic inhibitor called PcaV, enabling the bacteria to produce enzymes to break down other lignin-derived compounds. Credit Sello Lab/Brown University Usage Restrictions None 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.