immunoglobulin(redirected from immunoglobulin deficiency)
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n. Abbr. Ig
1. Any of a group of large glycoproteins, including all the antibodies that function in the vertebrate immune system, that have a structure consisting of two heavy chains and two light chains. There are five major classes of immunoglobulin isotypes: IgA, IgD, IgE, IgG, and IgM.
2. A preparation containing immunoglobulin proteins, especially immune globulin.
(Biochemistry) any of five classes of proteins, all of which show antibody activity. The most abundant ones are immunoglobulin G (IgG) and immunoglobulin A (IgA)
im•mu•no•glob•u•lin(ˌɪm yə noʊˈglɒb yə lɪn, ɪˌmyu-)
1. any of several classes of globulin proteins that function as antibodies.
2. the fraction of the blood serum containing antibodies.
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|Noun||1.||immunoglobulin - a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response|
gamma globulin, human gamma globulin - a plasma protein containing the immunoglobulins that are responsible for immune responses
antibody - any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response
IgA, immunoglobulin A - one of the most common of the five major classes of immunoglobulins; the chief antibody in the membranes of the gastrointestinal and respiratory tracts
IgD, immunoglobulin D - one of the five major classes of immunoglobulins; present in blood serum in small amounts
IgE, immunoglobulin E - one of the five major classes of immunoglobulins; present primarily in the skin and mucous membranes
IgG, immunoglobulin G - one of the five major classes of immunoglobulins; the main antibody defense against bacteria
IgM, immunoglobulin M - one of the five major classes of immunoglobulins; involved in fighting blood infections and in triggering production of immunoglobulin G
immunoglobulin[ˌɪmjʊnəʊˈglɒbjʊlɪn] N → inmunoglobulina f
n → Immunglobulin nt