| lysogenization | The process by which a bacterium becomes lysogenic. (05 Mar 2000) |
|---|---|
| lysogeny | <virology> The ability of some phages to survive in a bacterium as a result of the integration of their DNA into the host chromosome. The integrated DNA is termed a prophage. A regulator gene produces a repressor protein that suppresses the lytic activity of the phage, but various environmental factors, such as ultraviolet irradiation may prevent synthesis of the repressor, leading to normal phage development and lysis of the bacterium. The best example of this is bacteriophage lambda. (18 Nov 1997) |
| lysokinase | Term proposed for activator agents (e.g., streptokinase, urokinase, staphylokinase) that produce plasmin by indirect or multiple-stage action on plasminogen. (05 Mar 2000) |
| lysolecithin | A lysophosphatic acid that contains choline; capable of lysing erythrocytes. Synonym: lysophosphatidylcholine. (05 Mar 2000) |
| lysolecithin-lecithin acyltransferase | <enzyme> An enzyme that catalyses the reversible reaction of lysolecithin and another phospholipid (e.g., phosphatidylethanolamine) to form lecithin and lysophosphatidylethanolamine; a major route in the restructuring of lecithin. (05 Mar 2000) |
| lysolecithinase | <enzyme> An enzyme that catalyses the hydrolysis of a single fatty acid ester bond in lysoglycerophosphatidates with the formation of glyceryl phosphatidates and a fatty acid. Chemical name: 2-Lysophosphatidylcholine acylhydrolase Registry number: EC 3.1.1.5 (12 Dec 1998) |
| lysomonogalactosyldiacylglycerol acyltransferase | <enzyme> Transfers acyl group from acyl-acyl-carrier protein to an endogenous lysomonogalactosyldiacylglycerol to form monogalactosyldiacylglycerol Registry number: EC 2.3.1.- Synonym: acp-lysomgdg acyltransferase, monogalactosyldiacylglycerol synthase, mgdg synthase (26 Jun 1999) |
| lysophosphatide | <biochemistry, cell biology> Mono acyl derivatives of diacyl phospholipids that are present in membranes as a result of cyclic deacylation and reacylation of phospholipids. Membranolytic in high concentrations and fusogenic at concentrations that are just sub lytic. May have important modulatory roles. (15 Oct 1997) |
| lysophosphatidic acid | A phosphatidic acid in which only one of the two hydroxyl groups of the glycerophosphate is esterified; most commonly, when carbon-1 of the glycerol moiety is esterified (e.g., 1-acylglycerol-3-phosphate). (05 Mar 2000) |
| lysophosphatidic acid acyltransferase | 1-acylglycerol-3-phosphate acyltransferase. (05 Mar 2000) |
| lysophosphatidic acid phosphatase | <enzyme> Forms 1-acyl-sn-glycerol plus pi Registry number: EC 3.1.3.- (26 Jun 1999) |
| lysophosphatidic acid-hydrolysing lysophospholipase | <enzyme> Catalyses the hydrolysis of lysophosphatidic acids Registry number: EC 3.1.1.- Synonym: (1-acyl-sn-glycero-3-phosphate)-hydrolysing lysophospholipase, lpa-hydrolysing lysophospholipase, lpa-hlpl (26 Jun 1999) |
| lysophosphatidylcholine | A lysophosphatic acid that contains choline; capable of lysing erythrocytes. Synonym: lysophosphatidylcholine. (05 Mar 2000) |
| lysophosphatidylcholines | Derivatives of phosphatidylcholines obtained by their partial hydrolysis which removes one of the fatty acid moieties. (12 Dec 1998) |
| lysophosphatidylserine | Phosphatidylserin e from which one fatty acid residue has been removed from the glycerol moiety, typically at carbon-2. Compare: lysophosphatidic acid. (05 Mar 2000) |