| l-stercobilinogen | Reduction product of l-urobilinogen, precursor of l-stercobilin in the final stages of bilirubin metabolism; excreted in faeces, wherein it is oxidised to stercobilin. See: bilirubinoids. (05 Mar 2000) |
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| L-tartrate decarboxylase | <enzyme> Nad+ dependent enzyme; catalyses the decarboxylation of l-tartrate in pseudomonas sp. Group ve-2 forming glyceric acid and co2 via enzyme-bound oxaloglycolate Registry number: EC 4.1.1.- (26 Jun 1999) |
| L-tartrate dehydratase | <enzyme> From E coli; forms oxaloacetate and water; exists in an inactive low-molecular form, which is converted into the active enzyme in the presence of fe(2+) and thiol; related to class I fumarases Registry number: EC 4.2.1.32 Synonym: (r,r)-tartrate hydro-lyase (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) |
| L-tyrosine ammonia-lyase | <enzyme> Catalyses the conversion of tyrosine to trans-p-coumaric acid and ammonia Registry number: EC 4.3.1.- Synonym: tyrosine ammonia-lyase (26 Jun 1999) |
| L-xylulose reductase | <enzyme> Chemical name: xylitol nadp 4-oxidoreductase (l-xylulose-forming) Registry number: EC 1.1.1.10 (26 Jun 1999) |
| l-xylulosuria | essential pentosuria |
| L/S ratio | <abbreviation> Lecithin/sphingomyelin ratio. (05 Mar 2000) |
| L11 methyltransferase | <enzyme> Methylates the ribosomal protein l11 Registry number: EC 2.1.1.- (26 Jun 1999) |
| L49-sFv-beta-lactamase | <enzyme> A single-chain l49 (igg1) antibody fusion protein for anticancer prodrug activation; retains the antigen binding capability of monovalent l49 as well as the enzymatic activity of beta-lactamase Registry number: EC 3.5.2.- Synonym: l49-sfv-bl (26 Jun 1999) |
| La | Symbol for lanthanum. (05 Mar 2000) |
| la belle indifference | A naive, inappropriate lack of emotion or concern for the perceptions by others of one's disability, typically seen in persons with conversion hysteria. Origin: Fr. (05 Mar 2000) |
| la crosse virus | A species of the genus bunyavirus and member of the california group viruses causing human meningoencephalitis. This is the agent most responsible for california encephalitis, the most prevalent mosquito-borne disease recognised in the united states. (12 Dec 1998) |
| La protein | <molecular biology> Protein (45 kD) transiently bound to unprocessed cellular precursor RNAs that have been produced by polymerase III. Mainly located in the nucleus. (18 Nov 1997) |
| la-burnine | <chemistry> A poisonous alkaloid found in the unripe seeds of the laburnum. Source: Websters Dictionary (01 Mar 1998) |