antibody

7 ENTRIES FOUND:

an·ti·body

noun \ˈan-ti-ˌbä-dē\

medical : a substance produced by the body to fight disease

Full Definition of ANTIBODY

:  any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains —called also immunoglobulin

First Known Use of ANTIBODY

1894

Other Biochemistry Terms

bile, biodegradable, capsaicin, keratin, metabolism

an·ti·body

noun \ˈant-i-ˌbäd-ē\   (Medical Dictionary)
plural an·ti·bod·ies

Medical Definition of ANTIBODY

: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains—called also immunoglobulin

Illustration of ANTIBODY

antibody

noun    (Concise Encyclopedia)

Molecule in the immune system that circulates in blood and lymph in response to invasion by an antigen. Antibodies are globulins formed in lymphoid tissues by B cells, whose receptors are specialized to bind to a specific antigen. These receptors are copied as antibodies that attack the target antigens by binding to them, either neutralizing them or triggering a complement reaction. Antibodies have widely varying binding sites, providing protection from a wide range of infectious agents and toxic substances. Antibodies derived from the blood serum of infected people or animals are often given in an antiserum for quick immunization against fast-acting toxins or microbes. In 1975 César Milstein and colleagues developed a process for producing specific antibodies in virtually limitless amounts; these monoclonal antibodies can deliver radiation or drugs directly to specific antigens. See also antitoxin; reticuloendothelial system.

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