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- W1990993886 abstract "The avidin–biotin interaction was evaluated systematically by fluorescence spectroscopy under different conditions of temperature, pressure, pH, metal ions, incubation time and initial avidin concentration. The binding constant was calculated according to the modified Stern–Volmer equation, which deduced the existence of static quenching mechanism. The data obtained revealed that avidin–biotin interaction exhibited temperature, pH, metal ions, incubation time and initial avidin concentration sensitivity. The binding constants decreased with increase in temperature, while the binding sites were independent of temperature. The values of thermodynamic parameter ΔH (−149.85 kJ mol−1) and ΔS (−284.26 J mol−1 K−1) suggested hydrogen bonds and van der Waals played a major role in the reaction. The binding constants between avidin and biotin increased firstly and then decreased gradually with the increase of pH values. Metal ions can also affected the binding constants between avidin and biotin. The association kinetics firstly acquired by the combination of the change in fluorescence per unit time and the modified Stern–Volmer equation indicated that the reaction time required to reach equilibrium was 2200 s, and the average reaction rate for the binding process was very high in the first 180 s. Reaction of the avidin in the first 180 s was more than 40% of the total avidin involved in the whole process." @default.
- W1990993886 created "2016-06-24" @default.
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- W1990993886 date "2012-04-01" @default.
- W1990993886 modified "2023-10-18" @default.
- W1990993886 title "Systematic evaluation of avidin–biotin interaction by fluorescence spectrophotometry" @default.
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- W1990993886 doi "https://doi.org/10.1016/j.saa.2011.12.003" @default.
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