Hydrogen gas (H2) is a clean-burning fuel and energy source that can be produced biologically by bacteria. Photosynthetic bacteria are especially promising as biocatalysts for H2 production because energy from light can be used to drive this thermodynamically difficult process. The photosynthetic bacterium <italic>Rhodopseu ...

Methanogenesis is a globally important process responsible for the generation of >90% of the CH4 present on Earth. Despite this importance, key biochemical details concerning methanogenesis have eluded characterization. Presented here is a global analysis of the bioenergetics and substrate utilization in hydrogenotrophic ...