Figure 2.
Effect of concentration and time of exposure on Aβ binding to cells. PC12 cells were exposed for different periods of time to different concentrations of Aβ-FITC, and Aβ-FITC binding was analyzed by EPICs XL-MCL. A, Histograms of the number of cells versus Aβ-FITC fluorescence after 60 min exposure to different concentrations of Aβ-FITC. B, Percentages of cells (filled squares) and fluorescence intensity [geometric mean of fluorescence (GeoMean of Fluor), filled circles] of bound Aβ-FITC (M2 gate from A) as a function of the concentration of Aβ-FITC. C, Histograms of the number of cells versus Aβ-FITC fluorescence at different times of exposure to 2 μm Aβ-FITC. D, Percentages of cells with bound Aβ-FITC (M2 gate from C) as a function of time of exposure to 2 μm Aβ-FITC. Binding and the percentage of cells that bind Aβ-FITC increase as a function of time of exposure and concentration of Aβ to reach a saturation level.