| leucine zippers | Domains in DNA-binding proteins that contain amino acid sequences that show periodic arrays of leucine residues. These residues exist in an alpha-helical conformation, with the leucine side chains extending from one alpha helix interdigitating with those displayed from a similar alpha helix of a second polypeptide, facilitating dimerization. (12 Dec 1998) |
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| leucine-induced hypoglycaemia | Rare cause of hypoglycaemia occurring following ingestion of leucine. Seen especially in infants. (05 Mar 2000) |
| leucine-trna ligase | <enzyme> An enzyme that activates leucine with its specific transfer RNA. Chemical name: L-Leucine:tRNA(Leu) ligase (AMP-forming) Registry number: EC 6.1.1.4 (12 Dec 1998) |
| leucinic | <chemistry> Pertaining to, or designating, an acid obtained from leucin, and Synonym: oxycaproic acid. Source: Websters Dictionary (01 Mar 1998) |
| leucinopine | <biochemistry, cell biology> An analogue of nopaline found in crown gall tumours (induced by Agrobacterium tumefasciens) that do not synthesise octopine or nopaline. (15 Oct 1997) |
| leucinosis | A condition in which there is an abnormally large proportion of leucine in the tissues and body fluids. (05 Mar 2000) |
| leucinuria | The excretion of leucine in the urine. (05 Mar 2000) |
| leucite | 1. <chemical> A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius. 2. <botany> A leucoplast. Origin: Gr. White: cf. F. Leucite. Source: Websters Dictionary (01 Mar 1998) |
| leucitic | <chemical> Containing leucite; as, leucitic rocks. Source: Websters Dictionary (01 Mar 1998) |
| leucitoid | <chemistry> The trapezohedron or tetragonal trisoctahedron; so called as being the form of the mineral leucite. Origin: Leucite. Source: Websters Dictionary (01 Mar 1998) |
| leuco patent blue | A sulfonated triphenylmethane dye reduced and decolorised with zinc and acetic acid to produce a stable solution; used to demonstrate haemoglobin peroxidase. Synonym: patent blue V. (05 Mar 2000) |
| leucoanthocyanidin dioxygenase | <enzyme> Catalyses conversion of flavan-3,4-diols to 3-hydroxyanthocyanidins Registry number: EC 1.14.11.- Synonym: ldox enzyme (26 Jun 1999) |
| leucocidin | <protein> Exotoxins from staphylococcal and streptococcal species of bacteria that cause leucocyte killing or lysis. (18 Nov 1997) |
| leucocyte | Generic term for a white blood cell. The family consists of polymorphonuclear neutrophil (polymorphs), lymphocyte, eosinophil, basophil and each functions differently. (16 Dec 1997) |
| leucocythemia | <medicine> A disease in which the white corpuscles of the blood are largely increased in number, and there is enlargement of the spleen, or the lymphatic glands; leuchaemia. Origin: NL, fr. Gr. White + a hollow vessel + blood. Source: Websters Dictionary (01 Mar 1998) |