alexa Quantitative measurement of human interleukin 2 receptor levels with intact and detergent-solubilized human T-cells.


Journal of Alzheimers Disease & Parkinsonism

Author(s): Dower SK, Hefeneider SH, Alpert AR, Urdal DL

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Abstract 2A3 monoclonal antibody (gamma 1, kappa) is a novel high-affinity reagent for detecting the human interleukin 2 (IL-2) receptor. The antibody inhibits IL-2 binding to its receptor and is an antagonist of IL-2 action. Detailed analysis of the mechanism of binding of the IgG, (Fab')2 and Fab' of 2A3 antibody shows that the bivalent species cross-link on the cell surface when bound. Measurements of IL-2 receptor expression on digitonin-permeabilized cells suggest that the intracellular pool of receptors is small. The antibody will bind to IL-2 receptors on glutaraldehyde-fixed cells in the presence of Triton X-100. This property is used in designing an assay for quantitative measurements of IL-2 receptor concn in solution. This assay can be used to monitor receptor protein during purification to homogeneity.
This article was published in Mol Immunol and referenced in Journal of Alzheimers Disease & Parkinsonism

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