Biology as Poetry: Bioenergetics

Bacteriophage Ecology Group

Krebs Cycle

That aspect of cellular respiration, post pyruvate oxidation, during which the majority of NADH and carbon dioxide are generated.

An example of cyclical metabolic pathway, during the Krebs cycle 3 NADH, 1 ATP equivalent, and 1 FADH2 are generated along with 2 stoichiometry is doubled, i.e., to 6 NADH, 2 ATP, 2 FADH2, and 4 CO2. Indeed, all remaining carbons associated with the original glucose, at total of four, are converted to CO2 during the Krebs cycle.

The Krebs cycle is additionally the entry point of a number of non-sugar compounds into catabolism as well as as source of molecules that serve as "feedstock" for various anabolic pathways.

Other names for the Krebs cycle include citric acid cycle, tricarboxylic acid cycle, and Kreb's citric acid cycle.

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