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An ELISA protocol to improve the accuracy and reliability of serological antibody assays
Abstract
To assay serum antibodies by indirect ELISA, it is critical to eliminate a variety of false positive and negative reactions attributed to the principle.
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These include 1) the background (BG) noise reaction caused by hydrophobic binding of immunoglobulin components in sample specimens to solid surfaces, 2) false positive reaction caused by non-specific binding of immunoglobulins to target-antigens by protein-protein interactions, and 3) other false positive and negative reactions caused by buffer components.
No current blocking agents can prevent these false positive and negative reactions, and antibody assay results vary significantly depending on the buffer system used. To address these fundamental problems, we investigated all types of non-specific reactions involved in indirect ELISAs, and the blocking efficacy of current buffer systems and a newly developed ELISA buffer, ChonBlock™.
The accuracy and reliability of these assay results were examined in detail by inhibition te
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