immune protein


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an·ti·bod·y (Ab),

(an'tē-bod'ē), Avoid the jargonistic use of the plural antibodies when the reference is to a single antibody species.
An immunoglobulin molecule produced by B-lymphoid cells that combine specifically with an immunogen or antigen. Antibodies may be present naturally, their specificity is determined through gene rearrangement or somatic replacement or may be synthesized in response to stimulus provided by the introduction of an antigen; antibodies are found in the blood and body fluids, although the basic structure of the molecule consists of two light and two heavy chains, antibodies may also be found as dimers, trimers, or pentamers. After binding antigen, some antibodies may fix, complement, bind to surface receptors on immune cells, and in some cases may neutralize microorganisms.
See also: immunoglobulin.

immune protein

An antibody or immunoglobulin produced by plasma cells that identifies foreign antigens and initiates their destruction.
See also: protein
References in periodicals archive ?
Scientists have found two immune proteins that orchestrate a defense against West Nile virus.
And in the current study, they find that UV-B causes white blood cells called macrophages to migrate higher in the skin of mice and release an immune protein, interferon-y.
The man in the study takes immune proteins that help combat the virus he's carrying, Martin says.
Drugs made from immune proteins have revolutionised treatment in recent years.
It may be possible that alterations in the genes that regulate these immune proteins prevent a pregnant woman and her fetus from controlling a viral infection as quickly, and abnormal levels of chemokines could potentially alter the brain of a developing fetus.
But if we give preformed immune proteins to 1-day-old progeny, they are ready to fight infection," she says.
Researchers are trying to discover how the body makes immune proteins that can prevent viruses from entering cells, Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, said in July in the journal Science.
Understanding diseases in which the body's immune system fails to distinguish between the "self" and the "non-self" has come to include study of autoantibodies, immune proteins that damage specific tissues.
Proteins in their cell walls can promote sleep, as can immune proteins produced by the body, such as the cytokines interleukin-2 and interferon-a.
In March 2007 the USDA granted approval for Ventria Bioscience to grow rice engineered to produce human immune proteins. The proteins are intended for use in anti-diarrheal drugs and foods such as yogurt and granola bars.
This might be done by hydrolyzing immunoglobulins in whey and using the binding components or fragments to block intact immune proteins from binding to the antigenic site on the culture cell's surface.