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- W2003276187 abstract "A fluorescence sandwich immunoassay using high-affinity antibodies and quantum dot (QD) reporters has been developed for detection of botulinum neurotoxin serotype A (BoNT/A) using a nontoxic recombinant fragment of the holotoxin (BoNT/A-HC-fragment) as a structurally valid simulant for the full toxin molecule. The antibodies used, AR4 and RAZ1, bind to nonoverlapping epitopes present on both the full toxin and on the recombinant fragment. In one format, the immunoassay is carried out in a 96-well plate with detection in a standard plate reader using AR4 as the capture antibody and QD-coupled RAZ1 as the reporter. Detection to 31 pM with a total incubation time of 3 h was demonstrated. In a second format, the AR4 capture antibody was coupled to Sepharose beads, and the reactions were carried out in microcentrifuge tubes with an incubation time of 1 h. The beads were subsequently captured and concentrated in a rotating rod “renewable surface” flow cell equipped with a fiber optic system for fluorescence measurements. In PBS buffer, the BoNT/A-HC-fragment was detected to concentrations as low as 5 pM using the fluidic measurement approach." @default.
- W2003276187 created "2016-06-24" @default.
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- W2003276187 date "2009-09-01" @default.
- W2003276187 modified "2023-10-18" @default.
- W2003276187 title "Quantum dot immunoassays in renewable surface column and 96-well plate formats for the fluorescence detection of botulinum neurotoxin using high-affinity antibodies" @default.
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- W2003276187 doi "https://doi.org/10.1016/j.bios.2009.06.031" @default.
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