| alpha-(N-acetylaminomethylene)succinic acid hydrolase | <enzyme> Involved in degradation of vitamin b6; forms acetic acid plus ammonia plus carbon dioxide plus succinic monoaldehyde Registry number: EC 3.5.1.- Synonym: compound a hydrolase (26 Jun 1999) |
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| alpha-N-acylamino acid hydrolase | <enzyme> Functions in catabolism of n-acetylamino acids resulting from turnover of alpha-n-acetylated proteins Registry number: EC 3.5.1.- Synonym: alpha-n-acetylamino acid hydrolase, anaa-hase, n-acylaminoacyl-peptide hydrolase (26 Jun 1999) |
| Altmann's anilin-acid fuchsin stain | <technique> A mixture of picric acid, anilin, and acid fuchsin which stains mitochondria crimson against a yellow background. (05 Mar 2000) |
| ametriodinic acid | <chemical> 3-acetamido-5-(acetamidomethyl)-2,4,6-triiodobenzoic acid. An ionic monomeric contrast medium. Pharmacological action: contrast media. Chemical name: Benzoic acid, 3-(acetylamino)-5-((acetylamino)methyl)-2,4,6-triiodo- (12 Dec 1998) |
| aminoacetic acid | <amino acid, physiology> The simplest amino acid. It is a common residue in proteins, especially collagen and elastin and is not optically active. It is also a major inhibitory neurotransmitter in spinal cord and brainstem of vertebrate central nervous system. (18 Nov 1997) |
| aminocaproic acid | <chemistry> A group of compounds that are derivatives of aminohexanoic acids. <haematology> An antifibrinolytic agent, used to prevent bleeding in haemophilia, and after heart and prostate surgery when plasminogen or urokinase may be activated. (05 Mar 2000) |
| aminocarboxylic acid | <biochemistry> A class of organic molecules that containing an amino group and can combine in linear arrays to form proteins in living organisms. There are twenty common amino acids: alanine, arginine, aspargine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine. They are key components in all living things from which proteins are synthesised by formation of peptide bonds during ribosomal translation of messenger RNA. All the amino acids have the L configuration, except glycine which is not optically active. Other amino acids occurring in proteins, such as hydroxyproline in collagen, are formed by post translational enzymatic modification of amino acid residues in polypeptide chains. There are also several important amino acids, such as the neurotransmitter y aminobutyric acid, that have no relation to proteins. Amino acids can now be produced by biotechnology in bulk using fermentation and biotransformation. Acronym: AA (13 Nov 1997) |
| aminocitric acid | HOOCCH(NH3+)C(COOH)(OH)CH2CO; OH;found in acid hydrolysates of ribonucleoprotein in human spleen. (05 Mar 2000) |
| aminoethanoic acid | <amino acid, physiology> The simplest amino acid. It is a common residue in proteins, especially collagen and elastin and is not optically active. It is also a major inhibitory neurotransmitter in spinal cord and brainstem of vertebrate central nervous system. (18 Nov 1997) |
| aminoethylphosphonic acid | <chemical> (2-aminoethyl)-phosphonic acid. An organophosphorus compound isolated from human and animal tissues. Chemical name: Phosphonic acid, (2-aminoethyl)- (12 Dec 1998) |
| aminolevulinic acid | <chemical> Chemical name: Pentanoic acid, 5-amino-4-oxo- (12 Dec 1998) |
| aminooxyacetic acid | <chemical> (aminooxy)acetic acid. A compound that inhibits aminobutyrate aminotransferase activity in vivo, thereby raising the level of gamma-aminobutyric acid in tissues. Pharmacological action: enzyme inhibitors, gaba agents. Chemical name: Acetic acid, (aminooxy)- (12 Dec 1998) |
| aminopropionic acid | <amino acid> Alanine is a nonessential amino acid that can be manufactured by the body from other sources as needed. Alanine is one of the simplest of the amino acids and is involved in the energy-producing breakdown of glucose. In conditions of sudden anaerobic energy need, when muscle proteins are broken down for energy, alanine acts as a carrier molecule to take the nitrogen-containing amino group to the liver to be changed to the less toxic urea, thus preventing buildup of toxic products in the muscle cells when extra energy is needed. Because the body easily constructs alanine from other sources, no deficiency state is known. Alanine is found in a wide variety of foods, but is particularly concentrated in meats. (22 May 1997) |
| anisic acid | A crystalline volatile acid obtained from anise; its compounds are the antiseptic anisates. Synonym: 4-methoxybenzoic acid. (05 Mar 2000) |
| anthranilic acid | One of the products of tryptophan catabolism. Synonym: o-aminobenzoic acid. (05 Mar 2000) |