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Pubmed ID :2127927
Publication Date : //

Production of a bi-specific monoclonal antibody recognizing mouse kappa light chains and horseradish peroxidase. Applications in immunoassays.


The production of a bi-specific monoclonal antibody that simultaneously recognizes mouse kappa light chains and horseradish peroxidase (HRP) for use as a general developing reagent in a wide variety of immunobased techniques is described. This antibody, named McC10, was produced by the fusion of an aminopterin-sensitive interspecies hybridoma which secretes rat monoclonal antibodies against HRP (RAP2.Ag) and splenocytes from a rat immunized with whole mouse immunoglobulin (Ig)G. The hybrid-hybridoma generated from this fusion expresses and secretes rat Igs of the IgG1 and IgG2a subclasses, as determined by radial immunodiffusion. In competitive binding solid-phase enzymatic assays, McC10 was found to cross-react with all four mouse IgG subclasses as well as mouse kappa light chains. In contrast, in this type of assay, McC10 did not appear to recognize mouse IgA, IgM or lambda light chains. However, IgM-bearing kappa light chains were recognized by immunocytochemistry. Epitope specificity of this bi-specific antibody was more clearly determined on immunoblots where McC10 was found to exclusively recognize mouse kappa light chains and display no cross-reactivity with mouse Ig heavy chains nor with kappa light chains from rat or rabbit. In addition, McC10 was used successfully in two-step immunocytochemistry (ICC) for the localization of enkephalin, nerve growth factor (NGF) receptor and paired helical filament-immunoreactive sites in rat brain, rat skin and human brain, respectively, using mouse IgG's and IgM's as primary antibodies. McC10 compared favourably with peroxidase-anti-peroxidase (PAP) ICC with respect to sensitivity but was markedly superior with respect to specificity when used in fixed human brain or rat skin.(ABSTRACT TRUNCATED AT 250 WORDS)

Authors : Kenigsberg R L , Cuello A C ,

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