- Acid, amino
- One of the 20 building blocks of protein. The sequence of amino acids in a protein and, hence, the function of that protein are determined by the genetic code in the DNA. Amino acids are molecules that (in technical terms) contain a basic amino (NH2) group, an acidic carboxyl (COOH) group and a side chain attached to an alpha carbon atom. The 20 amino acids are alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine. The term "amino acids" dates to the middle of the 19th century. The idea that amino acids are "Bausteine" (building stones) came from the Nobel Prize winning German biochemist Albrecht Kossel (1853-1927).
Medical dictionary. 2011.
Look at other dictionaries:
δ-aminobutyric acid amino transferase — An enzyme catalyzing the reversible transfer of an amino group from δ aminobutyric acid to 2 oxoglutarate, thus forming a l glutamic acid and succinate semialdehyde. An important step in the catabolism of δ aminobutyric acid … Medical dictionary
Amino acid — This article is about the class of chemicals. For the structures and properties of the standard proteinogenic amino acids, see Proteinogenic amino acid. The generic structure of an alpha amino acid in its unionized form … Wikipedia
amino acid — n. Biochem. any of a group of organic compounds containing both the carboxyl (COOH) and amino (NH2) group, occurring naturally in plant and animal tissues and forming the basic constituents of proteins. Etymology: AMINE + ACID * * * amino acid… … Useful english dictionary
amino-sugar — Monosaccharide in which an OH group is replaced with an amino group; often acetylated. Common examples are D galactosamine, D glucosamine, neuraminic acid, muramic acid. Amino sugars are important constituents of bacterial cell walls, some… … Dictionary of molecular biology
Amino acid dating — is a technique used to estimate age in a wide variety ofsituations. This technique relates changes in amino acid molecules to thetime elapsed since they were formed. This technique is used in paleobiology, archaeology, forensic science, and… … Wikipedia
amino acid dating — amino acid dating, a method of dating dead organic matter by measuring the amount of change in the structure of the amino acids present after death: »When properly used, this dating method has important advantages over the radiocarbon… … Useful english dictionary
amino acid — n. 1. any of a large group of organic acids containing a carboxyl group, COOH, and an amino group, NH2 2. any of the 25 amino acids that link together into polypeptide chains to form proteins that are necessary for all life: in general, they are… … English World dictionary
amino acid transmitters — Amino acids released as neurotransmitter substances from nerve terminals and acting on postsynaptic receptors eg. g aminobutyric acid (GABA) and glycine that are fast inhibitory transmitters in the mammalian central nervous system. Glutamate and… … Dictionary of molecular biology
Amino acid oxidoreductases — are oxidoreductases, a type of enzyme, that act upon amino acids.They constitute the majority of enzymes classified under EC number 1.4, with most of the remainder being monoamine oxidases.Examples include: * Glutamate dehydrogenase * Nitric… … Wikipedia
Acid dye — is a member of a class of dye that is applied from an acidic solution. In the home or art studio, the acid used in the dyebath is often vinegar (acetic acid) or citric acid. The uptake rate of the dye is controlled with the use of sodium chloride … Wikipedia