| MDCR | Miller-Dieker [syndrome] chromosome region |
|---|---|
| MGCR | meningioma chromosome region |
| MHR | major histocompatibility region; malignant hyperthermia resistance; maternal heart rate; maximal hea... |
| MTACR | multiple tumor-associated chromosome region |
| NOR | noradrenaline; normal; nortriptyline; nucleolar organizer region |
| immunoglobulin domains | Structural units of immunoglobulin heavy or light chains that are composed of approximately 110 amino acids. Light chains of an immunoglobulin are composed of one constant domain and one variable domain. Heavy chains are composed of either three or four constant domains and one variable domain. (05 Mar 2000) |
|---|---|
| immunoglobulin E | <immunology> Class of immunoglobulin (188 kD) associated with immediate type hypersensitivity reactions and helminth infections. Present in very low amounts in serum and mostly bound to mast cells and basophils that have an immunoglobulin E specific Fc receptor (FceR). Immunoglobulin E has a high carbohydrate content and is also present in external secretions. Heavy chain of epsilon type. (30 Mar 1998) |
| immunoglobulin electrophoresis | <immunology, investigation> A test that detects and measures the various immunoglobulins in the blood. In the normal assay no monoclonal antibodies are detected but in multiple myeloma and chronic lymphocytic leukaemia a single clone of lymphocytes can produce one type of immunoglobulin that is detected in the electrophoresis as monoclonal (made by one cell clone). (30 Mar 1998) |
| immunoglobulin G | <immunology> The classical immunoglobulin class also called 7S IgG (150 kD). Composed of two identical light and two identical heavy chains, the constant region sequence of the heavy chains being of the type. The molecule can be described in another way as being composed of two Fab and an Fc fragment. The Fabs include the antigen combining sites, the Fc region consists of the remaining constant sequence domains of the heavy chains and contains cell binding and complement binding sites. Immunoglobulin Gs act on pathogens by agglutinating them, by opsonising them, by activating complement mediated reactions against cellular pathogens and by neutralising toxins. They can pass across the placenta to the foetus as maternal antibodies, unlike other Ig classes. In humans four main subclasses are known, IgG2 differs from the rest in not being transferred across the placenta and IgG4 does not fix complement. Immunoglobulin G is present at 8-16 mg/ml in serum. Synonym: gamma globulin. (30 Mar 1998) |
| immunoglobulin gm allotypes | Hereditary allotypic markers associated with the heavy chain of IgG. (12 Dec 1998) |
| immunoglobulin G subclass deficiency | A rare inherited disorder in which there are reduced levels of one or more IgG subclasses resulting from defective heavy chain genes or an abnormality in the regulation of immunoglobulin isotype switching. (05 Mar 2000) |
| immunoglobulin idiotypes | Unique, genetically controlled determinants present on antibodies whose specificity is limited to a single group of proteins (e.g., another antibody molecule or an individual myeloma protein). The idiotype appears to represent the antigenicity of the antigen-binding site of the antibody and to be genetically codetermined with it. The idiotypic determinants have been precisely located to the variable regions of both immunoglobin polypeptide chains. (12 Dec 1998) |
| immunoglobulin inv allotypes | Hereditary allotypic markers associated with the light chain of IgG. (12 Dec 1998) |
| immunoglobulin isotypes | The classes of immunoglobulins found in any species of animal. In man there are nine classes that migrate in five different groups in electrophoresis; they each consist of two light and two heavy protein chains, and each group has distinguishing structural and functional properties. (12 Dec 1998) |
| immunoglobulin M | <immunology> An immunoglobulin M molecule (970 kD) is built up from five immunoglobulin G type monomers joined together, with the assistance of J chains, to form a cyclic pentamer. Immunoglobulin M binds complement and a single molecule bound to a cell surface can lyse that cell. Immunoglobulin M is usually produced first in an immune response before immunoglobulin G. The human red cell isoantibodies are immunoglobulin M antibodies. Heavy chain (mu chain) is rather larger than the heavy chains of other immunoglobulins. (30 Mar 1998) |
| immunoglobulin superfamily | <immunology> A large group of proteins with immunoglobulin like domains. most are involved with cell surface recognition events. Sequence homologyy suggests that immunoglobulins, MHC molecules, some cell adhesion molecules and cytokines receptors share close homology and thus belong to a multigene family. (30 Mar 1998) |
| intravenous immunoglobulin | <pharmacology> A sterile solution of concentrated antibodies extracted from healthy people. IVIG is used to prevent bacterial infections in people with low or inappropriate antibody production. Injected into a vein or muscle. (09 Oct 1997) |
| tetanus immunoglobulin | <protein> A protein antibody to tetanus toxin, given as passive immunity for those lacking any prior tetanus vaccination. (27 Sep 1997) |
| thyroid stimulating immunoglobulin | <protein> A test that measures the amount of an antibody (thyroid stimulating antibody) which is directed against a receptor for TSH on the thyroid gland. This antibody acts like TSH and stimulates the thyroid to produce excessive amounts of thyroid hormone. The presence of this antibody generally indicates Grave's disease (hyperthyroidism). (27 Sep 1997) |
| anal region | The posterior portion of the perineal region through which the anal canal opens; bounded by a line through both isehial tuberosities, the sacrotuberous ligaments and the coccyx. Synonym: regio analis, anal region. (05 Mar 2000) |