immunoglobulin im`mu*no*glob"ulin ([i^]m`m[-u]*n[-o]*gl[o^]b"[-u]*l[i^]n) n. (1953) any one of a class of globular proteins which are antibodies and are produced by the immune system in animals.

Note: The immunoglobulins form a series of related proteins which are each composed of two pairs of polypeptide chains, called heavy (H) and light (L, meaning of lower molecular weight), all linked together by disulfide bonds. They are subdivided on the basis of the structural and antigenic properties of the H chains into four subgroups, {immunoglobulin G} (IgG), {immunoglobulin A} (IgA), {immunoglobulin M} (IgM), and {immunoglobulin D} (IgD). They are divided also into subclasses. Both H and L chains of anny given class and subclass have regions which are of constant structure within that class, as well as regions which are of variable structure. The variable regions impart the ability to recognize and bind to specific molecular structures, thus providing the organism the capacity to recognize and defend itself against the harmful effects of substances foreign to the body. --Stedman

Syn: Ig. [PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • immunoglobulin — immunoglobulin. См. иммуноглобулин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Immunoglobulin — vgl. Immunglobulin …   Das Wörterbuch medizinischer Fachausdrücke

  • immunoglobulin — [im′yə nōgläb′yə lin, i myo͞o΄nōgläb′yə lin] n. a globulin protein that participates in the immune reaction as the antibody for a specific antigen …   English World dictionary

  • Immunoglobulin — A protein produced by plasma cells and lymphocytes. Immunoglobulins are an essential part of the body s immune system which attach to foreign substances, such as bacteria, and assist in destroying them. Abbreviated Ig. The classes of… …   Medical dictionary

  • Immunoglobulin — Antikörper Molekül: schwere Ketten (rot), leichte Ketten (gelb). Antikörper (Immunglobuline, im internationalen Sprachgebrauch auch Immunoglobulin) sind Proteine (Eiweiße) aus der Klasse der Globuline, die in Wirbeltieren als Reaktion auf… …   Deutsch Wikipedia

  • immunoglobulin — antikūnas statusas T sritis chemija apibrėžtis Sudėtinis baltymas, kuris jungiasi su antigenu ir sudaro imuninį kompleksą. santrumpa( os) Ig atitikmenys: angl. antibody; immunoglobulin rus. антитело; иммуноглобулин ryšiai: sinonimas –… …   Chemijos terminų aiškinamasis žodynas

  • immunoglobulin — noun Date: 1953 antibody abbreviation Ig …   New Collegiate Dictionary

  • immunoglobulin — (Ig; im u no glob u lin) See antibody …   Dictionary of microbiology

  • immunoglobulin — /im yeuh noh glob yeuh lin, i myooh /, n. 1. any of several classes of structurally related proteins that function as antibodies or receptors and are found in plasma and other body fluids and in the membrane of certain cells. Cf. IgA, IgD, IgE,… …   Universalium

  • immunoglobulin — noun Any of the glycoproteins in blood serum that respond to invasion by foreign antigens and that protect the host by removing pathogens; an antibody. Syn: antibody …   Wiktionary

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