BIOL 371 Lecture Notes - Lecture 11: Hydrogenase, Nitrogen Fixation, Sulfite
Document Summary
Biol 371 lecture 11 metabolic diversity: chemolithotrophy and anaerobic respirations. Chemolithotrophic metabolism: hydrogen (h2) oxidation, oxidation of reduced sulfur compounds, nitrification and annamox. Introduction to anaerobic respiration: nitrate reduction and denitrification, sulfate and sulfur oxidation, acetogenesis (co2 as electron acceptor, methanogenesis (co2 as electron acceptor) These pathways are linked and in combination give rise to biogeochemical cycles. Chemolithotrophs are organisms that obtain energy from the oxidation of inorganic compounds. most chemolithotrophs are also autotrophic. But, some od require organic compounds as their carbon source, we call these microbes mixotrophs (not strictly autotrophic, they can use organic compounds as a carbon source) Atp generation is the same as for respiring chemoorganotrophs: electron transport chains and. Recall that the farther apart two half reactions are in terms of e0" of their redox couples, the greater the amount of energy released. Electrons from h2 are transferred to q by a hydrogenase.
