ATP
Adenosine Triphosphate or ATP represents the universal energy molecule. In a very real sense ATP is the power behind life. ATP is a nucleotide consisting of adenine, ribose, and a phosphate unit. It is the principal carrier of energy for all forms of life. ATP is estimated to provide 95% for all cellular energy throughout the body.
The Power behind Life
In essence, energy arrives from the Sun, but humans are unable to convert it directly …
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…rmediate substrates. Most ATP-mediated reactions require Mg2+ ions as cofactors.
ATP is regenerated by the rephosphorylation of AMP and ADP using the chemical energy obtained from the oxidation of food. This takes place during glycolysis and the Krebs cycle but, most significantly, is also a result of the reduction-oxidation reactions of the mitochondrial electron transport chain, which ultimately reduces molecular oxygen to water (oxidative phosphorylation). ATP is also formed by the light reactions of photosynthesis.
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