Definition of Antigen
Antigen: A substance that is capable of causing the production of an antibody.
Antigens may or may not lead to an allergic reaction. Allergens are antigens that cause an allergic reaction and the production of IgE.
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=2282
Last Editorial Review: 11/11/2001
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