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And '''antibody''' is a [[blood]] [[protein]] that is produced in response to, and counteracts, an [[antigen]]. Antibodies are produced in response to disease and help the body fight against the particular disease. In this way, antibodies help the body develop an immunity to disease.

'''Antibodies''' are [[blood]] circulating glyco[[protein]]s secreted by plasma cells (differentiated B lymphocytes) in response to immune stimulation. They constitute what is known as the humeral immune response, which is highly specific. Antibodies recognize and bind tightly to small molecules (peptide, lipid, or carbohydrate) termed [[antigen]]s. Antigens may be free floating in the blood, or bound to the plasma membrane of a pathogen or another immune cell. Antibodies are produced in response to disease and help the immune system fight against a particular disease.  

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==References==

==References==