| Rambourg's periodic acid-chromic methenamine-silver stain | <technique> A stain for glycoproteins, used with an electron microscope, adapted from the Gomori-Jones periodic acid-methenamine-silver stain; it produces silver deposits in mature saccules of the Golgi apparatus, lysosomal vesicles, cell coat, and basement membranes. (05 Mar 2000) |
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| p-aminobenzoic acid | A factor in the vitamin B complex, a part of all folic acids and required for its formation; neutralises the bacteriostatic effects of the sulfonamides since it furnishes an essential growth factor for bacteria, the utilization with which the sulfonamides interfere; used as an ultraviolet screen in lotions and creams. Synonym: paraaminobenzoic acid, vitamin Bx. Acronym: PABA (05 Mar 2000) |
| p-aminohippuric acid | <chemical> N-(4-aminobenzoyl)glycine. A diagnostic aid used as the sodium salt in renal function tests. Chemical name: Glycine, N-(4-aminobenzoyl)- (12 Dec 1998) |
| p-aminohippuric acid synthase | <enzyme> An enzyme in the liver that catalyses the synthesis of p-aminohippuric acid from p-aminobenzoic acid (or the CoA-derivative) and glycine. It may be identical with glycine acyltransferase. Acronym: PAH (05 Mar 2000) |
| p-aminosalicylic acid | <chemical> 4-amino-2-hydroxybenzoic acid. An antitubercular agent often administered in association with isoniazid. The sodium salt of the drug is better tolerated than the free acid. Pharmacological action: antitubercular agents. Chemical name: Benzoic acid, 4-amino-2-hydroxy- (12 Dec 1998) |
| gastric acid | Hydrochloric acid present in gastric juice. (12 Dec 1998) |
| maleic acid | HOOC-CH==CH-COOH; (Z)-butenedioic acid;the cis isomer of fumaric acid; used for preparing maleate salts of antihistaminics and similar drugs. Synonym: toxilic acid. (05 Mar 2000) |
| malic acid | HOOC-CH2-CHOH-COOH; hydroxysuccinic acid;an acid found in apples and various other tart fruits; an intermediate in the tricarboxylic acid cycle, the glyoxylate cycle, and in a shuttle system. Synonym: monohydroxysuccinic acid. (05 Mar 2000) |
| malic acid dehydrogenase | <enzyme> An enzyme that catalyses the conversion of (s)-malate and NAD+ to oxaloacetate and NADH. Chemical name: (S)-Malate:NAD+ oxidoreductase Registry number: EC 1.1.1.37 (12 Dec 1998) |
| Mallory's phosphotungstic acid haematoxylin stain | A stain with broad application in cytology and histology; nuclei, mitochrondria, fibrin, neuroglial fibrils, and cross-striations of skeletal and cardiac muscle stain blue; cartilage ground substance, bone reticulum, and elastin appear in shades of yellow-orange and brownish red; also useful for demonstrating abnormal or diseased astrocytes, often in combination with periodic acid-Schiff stain and Luxol fast blue. Synonym: Mallory's phosphotungstic acid haematoxylin stain. (05 Mar 2000) |
| pantoic acid | 2,4-Dihydroxy-3,3-dimethylbutyric acid;hOCH2C(CH3)2CHOH-COOH, the beta-alanine amide of which is pantothenic acid; a coenzyme A precursor. (05 Mar 2000) |
| pantothenic acid | <chemical> Chemical name: beta-Alanine, N-(2,4-dihydroxy-3,3-dimethyl-1-oxobutyl)-, (R)- (12 Dec 1998) |
| malonic acid | HOOC-CH2-COOH;a dicarboxylic acid of importance in intermediary metabolism; an inhibitor of succinate dehydrogenase. Synonym: propanedioic acid. (05 Mar 2000) |
| malonyl-CoA-anthranilic acid N-malonyltransferase | <enzyme> From peanuts Registry number: EC 2.3.1.- Synonym: anthranilic acid n-malonyltransferase, aa malonyltransferase, malonyl-coenzyme a-anthranilic acid n-malonyltransferase (26 Jun 1999) |
| paraaminobenzoic acid | A factor in the vitamin B complex, a part of all folic acids and required for its formation; neutralises the bacteriostatic effects of the sulfonamides since it furnishes an essential growth factor for bacteria, the utilization with which the sulfonamides interfere; used as an ultraviolet screen in lotions and creams. Synonym: paraaminobenzoic acid, vitamin Bx. Acronym: PABA (05 Mar 2000) |