Electron-transfer pathway (IMAGE) Max-Planck-Gesellschaft Caption A 3-MDa complex shows a complex electron-transfer pathway in which a conformational change gates electron flow to and from the center of flavin-based electron bifurcation (FBEB). High-energy electrons from FBEB are directly transferred to the site of CO2 reduction. Hdr = Heterodisufide reductase, Fdh = Format dehydrohenase, Fmd= formylmethanofuran dehydrogenase. Credit Max Planck Institute of Biophysics/Shin Usage Restrictions Use of images is limited to editorial coverage of scientific topics relating to the activities of the Max Planck Society. Any kind of commercial use (including, in particular, the exploitation of images by means of sale or incorporation in image databases or image catalogues) as well as any promotional use/use for merchandise purposes, disclosure to third parties or granting of related rights to third parties is expressly not permitted. License Original 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.