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n. protein in the blood which reacts to infectious agents
The following video provides you with the correct English pronunciation of the word "Antibody", to help you become a better English speaker.
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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 (a structure analogous to a lock) that is specific for one particular epitope (similarly analogous to a key) 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 (for example, by blocking a part of a microbe that is essential for its invasion and survival). The production of antibodies is the main function of the humoral immune system.
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1. 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
(part-meronym) active site
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