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  • Title: Quantitative and qualitative analysis of the Fc receptor for IgE (Fc epsilon RII) on human eosinophils.
    Author: Jouault T, Capron M, Balloul JM, Ameisen JC, Capron A.
    Journal: Eur J Immunol; 1988 Feb; 18(2):237-41. PubMed ID: 2965022.
    Abstract:
    In order to characterize the Fc receptor for IgE (Fc epsilon RII) on human eosinophils, we have compared the binding of human IgE myeloma protein to that of a monoclonal antibody (mAb BB10) directed against a common antigenic determinant of the Fc epsilon RII present on eosinophils, platelets and macrophages. Scatchard analysis of the binding to human eosinophils of the BB10 mAb revealed a linear monophasic binding curve, with a binding affinity of 1.17 x 10(7) M-1 and a number of 10(5) binding sites per cell. Biochemical analysis of the human eosinophil Fc epsilon R, performed by immunosorbent chromatography with either BB10 mAb or IgE, showed under nonreducing conditions a major component of 200 kDa. Under reducing conditions, 3 peptide fragments were obtained, with molecular masses of 45-50, 23 and 15 kDa. Finally, comparative analysis suggested that the Fc epsilon RII of human eosinophils and of a human macrophage cell line (U937) are structurally related and differ from the high-affinity Fc epsilon RI present on basophilic granulocytes.
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