Figure 2From: Anti-Ids in Allergy: Timeliness of a Classic ConceptCategories of anti-idiotypic antibodies. Ab2α antibodies recognize idiotopes outside the antigen binding site, but still within the variable region of Ab1. Ab2γ recognizes idiotopes close to the antigen binding site of Ab1 and thus may interfere with the antigen binding. Internal image Ab2β binds directly within the antigen binding site.Back to article page