NNT in Membrane (IMAGE) Institute of Science and Technology Austria Caption The enzyme transhydrogenase (NNT) embedded into the lipid bilayer of the mitochondrial membrane. Credit Martina Maritan Usage Restrictions Image may only be used with appropriate credit. 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.