What is a biochemical way


Under Metabolic pathways (engl. metabolic pathways) is understood to be the enzyme-catalyzed build-up / breakdown and remodeling processes in the cells, with the starting materials usually in one biochemical cycle be smuggled in.

Biochemical cycles

Reaction sequences in which metabolites occur and from which they can be removed. The ring closure takes place through regeneration or subsequent delivery of the starter molecule. The best-known example: the citric acid cycle, the "hub of metabolism", in which anabolic and catabolic pathways of carbohydrates, proteins and fats converge. Many of these cycles were named after their discoverers (name reactions) and thus represent a piece of biochemical history.

Calvin cycle

Citric acid cycle

  • Final dismantling of a C2Compound (activated acetic acid = acetyl-CoA) with formation of CO2 and the reduction equivalents NADH, H+ and FADH2that occur in the respiratory chain with the formation of H2O) are oxidized
    • also called "Krebs cycle", named after Sir Hans-Adolf Krebs

Cori cycle

  • Pathways of glucose metabolism involving the liver and skeletal muscle

Urea cycle

  • Ammonia detoxification in the liver through a metabolite cycle between mitochondria and cytosol

Hatch Slack cycle

  • C.4 Dicarboxylate pathway via two cell types of the C4-Plants
    • named after Marshall Hatch and Roger Slack

Lynen cycle

Pentose phosphate cycle

  • extended version of the Calvin cycle: build-up and breakdown of pentose phosphates

Q cycle

Substrate cycle

  • Idle cycle through repeated phosphorylation / dephosphorylation of a metabolite. Regulatory function; possible importance for heat generation

Metabolic pathways, sorted by function

Pathways of cellular respiration

Other ways

See also

Steady state, bioenergetics, enzyme kinetics, energy coupling, photosynthesis, open system, cofactor, cosubstrate, coenzyme

Category: Metabolism