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22 bytes added ,  07:21, March 11, 2007
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An Antigen is a specialized [[protein]], though sometimes it can be a carbohydrate instead.  When an antigen is injected into the bloodstream, as through vaccination, it causes the body to produce [[antibodies]].
 
An Antigen is a specialized [[protein]], though sometimes it can be a carbohydrate instead.  When an antigen is injected into the bloodstream, as through vaccination, it causes the body to produce [[antibodies]].
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[[Category:Biology]]
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