| 4-hydroxyproline oxidase | A flavoenzyme that catalyses the conversion of 4-hydroxyproline to d'-pyrroline-3-hydroxy-5-carboxylate using FAD; this enzyme appears to be deficient in individuals with hyperhydroxyprolinaemia, an enzyme that catalyses the reaction of 4-hydroxyproline with NAD+ to form NADH and 4-oxoproline. Synonym: 4-oxoproline reductase. (05 Mar 2000) |
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| 4-phenylenediamine oxidase | <enzyme> When used as assay for ceruloplasmin, index *ceruloplasmin Registry number: EC 1.4.- Synonym: polyphenylenediamine oxidase, ppd oxidase, p-phenylenediamine oxidase (26 Jun 1999) |
| folic acid oxidase | <enzyme> Enzyme from human red blood cell membranes; catalyses oxidation of folic acid to pterin-6-aldehyde plus p-aminobenzoylglutamic acid in presence of h2o2; singlet oxygen is involved Registry number: EC 1.11.- (26 Jun 1999) |
| L-aspartate oxidase | <enzyme> E coli enzyme; forms unstable product, iminoaspartate; b protein of quinolinate synthetase Registry number: EC 1.4.3.16 Synonym: b-protein, quinolinate synthetase, l-aspartate - fumarate oxidoreductase (26 Jun 1999) |
| formyl sterol oxidase | <enzyme> Converts sterol 4-aldehyde to a carboxylic acid in presence of NADH or NADPH Registry number: EC 1.2.1.- (26 Jun 1999) |
| fructosyl lysine oxidase | <enzyme> Isolated from fusarium oxysporum; mw 50 kD; catalyses the h2o2-producing deglycating oxidation of n(alpha/epsilon)-fructosyl-n(alpha/epsilon) )-z-lysine Registry number: EC 1.4.3.- (26 Jun 1999) |
| L-galactonolactone oxidase | <enzyme> Flavin-containing enzyme from yeast which utilises oxygen as electron acceptor; forms ascorbic acid Registry number: EC 1.3.3.24 Synonym: galactono-gamma-lactone oxidase, l-galactono-1,4-lactone-oxygen 3-oxidoreductase (26 Jun 1999) |
| L-gulonolactone oxidase | <enzyme> Forms ascorbic acid Registry number: EC 1.1.3.8 Synonym: l-gulonooxidase, l-gulono-gamma-lactone dehydrogenase, l-gulono-gamma-lactone oxidase (26 Jun 1999) |
| lignoceroyl-CoA oxidase | <enzyme> Catalyses the beta-oxidation of lignoceroyl-CoA Registry number: EC 1.3.3.- (26 Jun 1999) |
| L-lysine oxidase | <enzyme> Converts l-lysine to 2-oxo-6-aminohexanoate Registry number: EC 1.4.3.14 Synonym: l-lysine-alpha oxidase (26 Jun 1999) |
| L-tryptophan 2',3'-oxidase | <enzyme> Specifically catalyses the alpha,beta-dehydrogenation of l- tryptophan derivatives; from chromobacterium violaceum Registry number: EC 1.3.99.- Synonym: l-tryptophan - oxygen 2',3'-oxidoreductase, l-trp-2',3'-oxidase (26 Jun 1999) |
| lysyl oxidase | <enzyme> Extracellular enzyme that deaminates lysine and hydroxylysine residues in collagen or elastin to form aldehydes, that then interact with each other or with other lysyl side chains to form crosslinks. (18 Nov 1997) |
| Abbe test plate | <equipment> A long, wedge-shaped coverslip about 0.20 mm thick at one end and 0.10 to 0.12 mm at the other end coated chemically with a silver film on which are ruled horizontal lines. at each variation in thickness of 0.01 mm there are vertical lines. By means of oblique illumination and by focusing on different portions of the plate, it is possible to determine the optimum coverslip thickness for any objective and also, for microscopes with drawtubes, the tube length for best objective performance. The approximate freedom from spherical and chromatic aberrations can also be estimated. Small isolated bits of silver near the edges of the lines form good objects for the star test (05 Aug 1998) |
| acetone test | A test for ketonuria; the suspected urine is shaken up with a few drops of sodium nitroprusside, and strong ammonia water is then gently poured over the mixture; if acetone is present, a magenta ring forms at the line of contact; tablets containing sodium nitroprusside and alkali are now more commonly used. (05 Mar 2000) |
| achievement test | A standardised test used to measure acquired learning, e.g., competence in a specific subject area such as reading or arithmetic, in contrast to an intelligence test which is a useful index of potential ability or learning. (05 Mar 2000) |