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dipeptide is a molecule consisting of two amino acids joined by a single peptide bond.
Dipeptides are produced from
polypeptides by the action of the hydrolase enzyme dipeptidyl peptidase. Dietary proteins are digested to dipeptides and amino acids, and the dipeptides are absorbed more rapidly than the amino acids, because their uptake involves a separate mechanism. Dipeptides activate G-cells found in the stomach to secrete gastrin.
Bergmann azlactone peptide synthesis is a classic organic synthesis for the preparation of dipeptides. 
Examples of dipeptides
( Carnosine beta-alanyl-L-histidine) is highly concentrated in muscle and brain tissues.
Anserine ( beta-alanyl-N-methyl histidine) is found in the skeletal muscle and brain of mammals.
Homoanserine (N-(4-Aminobutyryl)-L-histidine) is another dipeptide identified in the brain and muscles of mammals.
(L-tyrosyl-L-arginine) is a neuroactive dipeptide which plays a role in pain regulation in the brain.
Kyotorphin Balenine (or ophidine) ( beta-alanyl-N tau-methyl histidine) has been identified in the muscles of several species of mammal (including man), and the chicken.
( Aspartame N-L-a-aspartyl-L-phenylalanine 1-methyl ester) is an artificial sweetener.
Glorin (N- propionyl- γ-L-glutamyl-L-ornithine- δ-lac ethyl ester) is a chemotactic dipeptide for the slime-mould Polysphondylium violaceum.
Barettin (cyclo-[(6-bromo-8-en-tryptophan)-arginine]) is a cyclic dipeptide from the marine sponge Geodia barretti.
M. Bergmann et al., Ann. 449, 277 (1926). ^ drugfuture.com Link ^
This article is licensed under the
GNU Free Documentation License. It uses material from the Wikipedia article "Dipeptide". A list of authors is available in Wikipedia.
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