Universal donor blood (IMAGE) Technical University of Denmark Caption The ABO blood group antigens found on the surface of red blood cells are also found on the mucosal layer that lines the surface of the gut. Researchers have harnessed a specialized human gut bacterium and its ability to use these antigens as nutrients to discover and develop two enzyme mixtures that convert group A and B red blood cells into universal donor blood. Graphic: Mathias Jensen, postdoc at DTU. Credit Graphic: Mathias Jensen, postdoc at DTU. Usage Restrictions To use the image in another context, please contact press@dtu.dk. 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.