Definitions for Antibodyˈæn tɪˌbɒd i
This page provides all possible meanings and translations of the word Antibody
Random House Webster's College Dictionary
an•ti•bod•yˈæn tɪˌbɒd i(n.)(pl.)-bod•ies.
any of numerous protein molecules produced by B cells as a primary immune defense, each kind having a uniquely shaped site that combines with a foreign antigen, as of a virus or bacterium, and disables it.
antibodies of a particular type collectively.
Ref: Also called immunoglobulin.
Origin of antibody:
1895–1900; trans. of G Antikörper
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
A protein produced by B-lymphocytes that binds to a specific antigen.
Origin: a calque of Antikörper.
An antibody, also known as an immunoglobulin, is a large Y-shaped protein produced by B-cells that is used by the immune system to identify and neutralize foreign objects such as bacteria and viruses. The antibody recognizes a unique part of the foreign target, called an antigen. Each tip of the "Y" of an antibody contains a paratope that is specific for one particular epitope on an antigen, allowing these two structures to bind together with precision. Using this binding mechanism, an antibody can tag a microbe or an infected cell for attack by other parts of the immune system, or can neutralize its target directly. The production of antibodies is the main function of the humoral immune system. Antibodies are secreted by a type of white blood cell called a plasma cell. Antibodies can occur in two physical forms, a soluble form that is secreted from the cell, and a membrane-bound form that is attached to the surface of a B cell and is referred to as the B cell receptor. The BCR is only found on the surface of B cells and facilitates the activation of these cells and their subsequent differentiation into either antibody factories called plasma cells, or memory B cells that will survive in the body and remember that same antigen so the B cells can respond faster upon future exposure. In most cases, interaction of the B cell with a T helper cell is necessary to produce full activation of the B cell and, therefore, antibody generation following antigen binding. Soluble antibodies are released into the blood and tissue fluids, as well as many secretions to continue to survey for invading microorganisms.
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