antibody(redirected from PRA)
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When bacteria enter a flesh wound, a B cell releases antibodies, which attach to the bacteria and direct them toward a macrophage for destruction.
n. pl. an·ti·bod·ies
Any of numerous Y-shaped glycoproteins that bind to specific antigens and either neutralize them or cause them to be destroyed by other elements of the immune system, such as phagocytes, cytotoxic cells, or complement proteins. Antibodies occur as antigen receptors on the surface of B cells and are secreted as soluble proteins when the B cells mature into plasma cells. Antibodies are also called "immunoglobulins."
[Translation of German Antikörper : anti-, antagonistic (from Latin anti-, anti-) + Körper, body.]
n, pl -bodies
(Biochemistry) any of various proteins produced in the blood in response to the presence of an antigen. By becoming attached to antigens on infectious organisms antibodies can render them harmless or cause them to be destroyed. See also immunoglobulin
an•ti•bod•y(ˈæn tɪˌbɒd i)
n., pl. -bod•ies.
1. 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.
2. antibodies of a particular type collectively. Also called immunoglobulin.
[1895–1900; translation of German Antikörper]
A protein produced in the blood or tissues in response to the presence of a specific foreign antigen. Antibodies provide immunity against certain microorganisms and toxins by binding with them and often by deactivating them. Also called immunoglobulin.
Did You Know? Antibodies are complex, Y-shaped protein molecules that guard our bodies against diseases. The immune system's B lymphocytes, or B cells, develop into plasma cells, which can produce a huge variety of antibodies, each one capable of grabbing an invading molecule at the top ends of the Y. The molecules that antibodies recognize can be quite specific—they might exist only on a particular bacterium or virus. When that bacterium or virus enters the body, the antibodies quickly recognize its molecules, as if a sentry recognized an enemy soldier from his uniform. Once the invader is caught, the antibodies may make it inactive or lead it to cells that can destroy it. High numbers of a particular antibody may persist for months after an invasion. The numbers may then get quite small, but the experienced B cells can quickly make more of that specific antibody if necessary. Vaccines work by training B cells to do just that.
A protein released by blood cells to destroy invading foreign organisms or substances.
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|Noun||1.||antibody - 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|
active site - the part of an enzyme or antibody where the chemical reaction occurs
protein - any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes; "a diet high in protein"
autoantibody - an antibody acting against tissues of the organism that produces it
precipitin - an antibody that causes precipitation when it unites with its antigen
ABO antibodies - blood type antibodies
Rh antibody - rhesus factor antibody
antitoxin - an antibody that can neutralize a specific toxin
agglutinin - an antibody that causes agglutination of a specific antigen
Forssman antibody, heterophil antibody, heterophile antibody - an antibody found in the blood of someone suffering from infectious mononucleosis
alloantibody, isoantibody - an antibody that occurs naturally against foreign tissues from a person of the same species
monoclonal, monoclonal antibody - any of a class of antibodies produced in the laboratory by a single clone of cells or a cell line and consisting of identical antibody molecules
opsonin - an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes
antibody[ˈæntɪˌbɒdɪ] N → anticuerpo m
antibody[ˈæntɪˌbɒdɪ] n → anticorpo
antibody→ جِسْم مُضادّ للحيوِيّات protilátka antistof Antikörper αντίσωμα anticuerpo vasta-aine anticorps antitijelo anticorpo 抗体 항체 antistof antistoff przeciwciało anticorpo антитело antikropp แอนติบอดี antikor kháng thể 抗体
n. anticuerpo, sustancia de proteína que actúa como respuesta a la presencia de antígenos;
___formation → formación de ___-s;
cross-reacting ___ → ___ de reacción cruzada;
monoclonal ___ → ___ monoclónico, derivado de células de hibridoma.