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Dehydration reaction
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==Condensation reactions occurring in living organisms== Condensation dehydration reactions are fundamental to the existence of life as this type of reaction produces proteins from [[amino acids]], [[DNA]] and [[RNA]] from [[nucleotides]], [[fat|fats]] from [[fatty acids]], and [[polysaccharides]] (eg. cellulose, starch, sugar, lactose) from monosaccharides (eg. glucose and fructose). The formation of the [[pyrophosphate]] bond is an important dehydration reaction relevant to bioenergetics. [[Phosphorylation]] is a type of condensation dehydration reaction that is widely used to catalyze condensation reactions in living organisms. This phosphorylation usually involves the simultaneous dephosphorylation of [[Adenosine triphosphate|ATP]] and therefore does not result in the release of H<sub>2</sub>O. These reactions are all mediated by [[enzymes]].
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