Figure 4: Quantitative analysis of the effect of PEG length on the binding affinity and selectivity of micellar formulations after FACS analysis in a cocultured cell model. (A) The percent of cells with associated micelles indicated as the cell population shifted to the region with higher red fluorescence intensity in the dot plot acquired by FACS analysis. (B) The binding affinity defined as the percent of MCF-7 cells with associated micelles divided by the total MCF-7 cells tested; The binding selectivity defined as the percent of MCF-7 cells with associated micelles divided by the percent of C166-GFP cells with associated micelles (mean ± SD, n=9).