Immunogen: purified human IgE (preincubated with mouse serum anti human IgG) Species cross-reactivity: nd

Cell surface receptors for the Fc fragments of IgE (FcR) have been identified on a variety of cell types from hematopoietic origin. The low affinity receptor for IgE (CD23) has been described as a B cell-activation marker. IgE-binding factors have been shown to play a major role in the regulation of IgE production. Basophils and mast cells express FcR1, which bind IgE with high affinity and the reaction of allergen with cell-bound IgE induces the release of a variety of pharmacologically active mediators that are responsible for the clinical manifestations of allergic disorders. mAb27 was generated from a mouse immunization program aiming at producing mAb specific for human IgE-Fc in order to map the sites on IgE interacting with receptors on target cells. (Chrétien I. et al, J. Immunol, 1988, (9) 141, pp3128-34)