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- W2333089277 abstract "In the present paper, the utility of a special potentiometric titration approach for recognition and calculation of biomolecule/small-molecule interactions is reported. This approach is fast, sensitive, reproducible, and inexpensive in comparison to the other methods for the determination of the association constant values (Ka) and the interaction energies (ΔG). The potentiometric titration measurement is based on the use of a classical polymeric membrane indicator electrode in a solution of the small-molecule ligand. The biomolecule is used as a titrant. The potential is measured versus a reference electrode and transformed into a concentration-related signal over the entire concentration interval, also at low concentrations, where the millivolt (y-axis) versus log canalyte (x-axis) potentiometric calibration curve is not linear. In the procedure, Ka is calculated for the interaction of cocaine with a cocaine binding aptamer and with an anticocaine antibody. To study the selectivity and cross-reactivity, other oligonucleotides and aptamers are tested, as well as other small ligand molecules such as tetrakis(4-chlorophenyl)borate, metergoline, lidocaine, and bromhexine. The calculated Ka compared favorably to the value reported in the literature using surface plasmon resonance. The potentiometric titration approach called “concentration-related response potentiometry” is used to study molecular interaction for seven macromolecular target molecules and four small-molecule ligands." @default.
- W2333089277 created "2016-06-24" @default.
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- W2333089277 date "2014-11-25" @default.
- W2333089277 modified "2023-09-25" @default.
- W2333089277 title "Concentration-Related Response Potentiometric Titrations To Study the Interaction of Small Molecules with Large Biomolecules" @default.
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- W2333089277 doi "https://doi.org/10.1021/ac503385x" @default.
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