Acetate-triggered immune response (IMAGE) RIKEN Caption Acetate increased IgA production (yellow). IgA bound to potentially harmful bacteria (green), and prevented them from invading the mucus layer (red). Credit RIKEN 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.