igd
Noun: 1. Immunoglobulin D (IgD): One of the five major classes (isotypes) of antibodies (immunoglobulins) found in the immune system. It is present in very small quantities in blood serum and is primarily found on the surface of mature B-cells, where it functions as part of the B-cell receptor complex.
IgD is a specialized scientific term used primarily in the fields of immunology, medicine, and biology. * It is used to discuss the structure, function, or measurement of this specific antibody class. * It is often mentioned in contrast to the other immunoglobulin isotypes: IgA, IgE, IgG, and IgM.
- Scientific Context:
- The role of IgD in the human immune response is still not fully understood.
- Laboratory tests showed normal levels of IgD in the patient's serum.
- Unlike IgM, IgD is co-expressed on the surface of naive B lymphocytes.
- "IgD antibody": Refers to an antibody molecule of the IgD class.
- The B-cell receptor can include an IgD antibody.
- "IgD deficiency": A rare condition characterized by low or absent levels of IgD.
- Isolated IgD deficiency is usually not associated with clinical symptoms.
- Immunoglobulin (n): The general term for the protein family (antibodies) to which IgD belongs.
- Antibody (n): A protein produced by the immune system to neutralize pathogens; immunoglobulins are antibodies.
- Isotype (n): In immunology, a class of immunoglobulins (e.g., IgA, IgD, IgE, IgG, IgM) defined by the constant region of the heavy chain.
- Immunoglobulin D: The full, formal name for IgD.
This word has a single, highly specific meaning in scientific and medical terminology. It does not have common idiomatic expressions or phrasal verbs associated with it.
-
one of the five major classes of immunoglobulins; present in blood serum in small amounts
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