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Induction of basophil degranulation. Displayed are the percentages of ß-hexosaminidase releases (y-axes) induced by three different concentrations of peanut allergen extract (x-axes) when RBL cells were loaded with sera from asymptomatic African (A), peanut-allergic Swedish (B), asymptomatic Swedish patients (C), or IgG-depleted African sera (D).
