lectin


lectin
Any of a group of glycoproteins of primarily plant (usually seed) origin that binds to glycoproteins on the surface of cells causing agglutination, precipitation, or other phenomena resembling the action of specific antibody; lectins include plant agglutinins (phytoagglutinins, phytohemagglutinins), plant precipitins, and perhaps certain animal proteins; some have mitogenic properties and induce lymphocyte transformation. [L. lego, pp. lectum, to select, + -in]
- mitogenic l. a l. that induces the replication of polynucleic acids and the proliferation of lymphocytes.

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lec·tin 'lek-tən n any of a group of proteins esp. of plants that are not antibodies and do not originate in an immune system but bind specifically to carbohydrate-containing receptors on cell surfaces (as of red blood cells)

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lec·tin (lekґtin) any of a group of hemagglutinating proteins, found primarily in plant seeds, which bind specifically to the branching sugar molecules of glycoproteins and glycolipids on the surface of cells. Certain lectins selectively cause agglutination of erythrocytes of certain blood groups and of malignant cells but not their normal counterparts; others stimulate the proliferation of lymphocytes.

Medical dictionary. 2011.

Look at other dictionaries:

  • lectin — [lek′tin] n. [coined (1954) < L lectus, pp. of legere, to select + IN1] any of several proteins, found in plants and animals, that bind to specific sugar molecules, as on cancer or red blood cells …   English World dictionary

  • Lectin — Lectins are sugar binding proteins which are highly specific for their sugar moieties. They typically play a role in biological recognition phenomena involving cells and proteins. For example, some bacteria use lectins to attach themselves to the …   Wikipedia

  • Lectin — Hemagglutinin lateral Lektine sind komplexe Proteine oder Glykoproteine, die spezifische Kohlenhydratstrukturen binden und dadurch in der Lage sind, sich spezifisch an Zellen bzw. Zellmembranen zu binden und von dort aus biochemische Reaktionen… …   Deutsch Wikipedia

  • lectin — noun Etymology: Latin lectus (past participle of legere to pick, select) + 1 in more at legend Date: 1954 any of a group of proteins especially of plants that are not antibodies and do not originate in an immune system but bind specifically to… …   New Collegiate Dictionary

  • lectin — Proteins obtained particularly from the seeds of leguminous plants, but also from many other plant and animal sources, that have binding sites for specific mono or oligosaccharides. Named originally for the ability of some to selectively… …   Dictionary of molecular biology

  • lectin — /lek tin/, n. Biochem. any of a group of proteins that bind to particular carbohydrates in the manner of an antibody and are commonly extracted from plants for use as an agglutinin, as in clumping red blood cells for blood typing. [1954; < L… …   Universalium

  • lectin — noun Any of a class of plant proteins that bind specific carbohydrates …   Wiktionary

  • Lectin — Lec|tin [lat. legere, lectum = lesen, auflesen, auslesen; ↑ in (3)], das; s, e; S: Lektin; veraltete Syn.: Phytagglutinin, Phyt[o]hämagglutinin (PHA), Protektin, Toxalbumin: Sammelbez. für hochmol. Glykoproteine pflanzlicher, mikrobieller oder… …   Universal-Lexikon

  • lectin — n. any of a number of plant proteins that bind to particular carbohydrates (Biochemistry) …   English contemporary dictionary

  • lectin — noun Biochemistry a protein which binds specifically to a sugar and causes agglutination of particular cell types. Origin 1950s: from L. lect , legere choose + in1 …   English new terms dictionary