Utilization of kinetically enhanced monovalent binding affinity by immunoassays based on multivalent nanoparticle-antibody bioconjugates.


The monovalent binding affinity of high binding site density nanoparticle-antibody bioconjugates is shown to exceed the intrinsic affinity of the original, monoclonal antibody. The nanoparticle-antibody bioconjugates were prepared by covalent coupling of antibodies to long-lifetime fluorescent, europium(III) chelate nanoparticles, 107 nm in diameter… (More)


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