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Immunological Investigations
A Journal of Molecular and Cellular Immunology
Volume 15, 1986 - Issue 8
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Original Article

Human IgG and Murine Monoclonal Antibodies Share Common Idiotopes as Determined by Competitive Binding to Polystyrene and Nitrocellulose-Bound Antigens

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Pages 801-811 | Published online: 07 Jul 2009
 

Abstract

Competitive binding to polystyrene-bound antigens showed that human rye Group I (rye I)-specific IgG recognize the same three distinct epitopes of rye I as three monoclonal antibodies directed against the same antigens. Anti-idiotypic antibodies against one of the monoclonal antibodies (290A-167) inhibit completely the reaction between rye I and the relevant monoclonal antibodies but do not affect the reaction between other monoclonal antibodies (348A-6 and 539A-6) and the antigens. Furthermore, rabbit anti-idiotypic antibodies produced against F(ab')2 of human rye I-specific IgG could inhibit the reaction between two monoclonal antibodies (290A-167 and 539A-6) and the relevant antigens. Those results were obtained by competitive binding to polystyrene or to nitrocellulose-bound antigens. These data indicate a cross-reactivity of idiotypic determinants between human rye I-specific IgG and mouse monoclonal antibodies, which implies structural similarity in the V gene coding for the variable region of the antibody.

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