Effect of storage in additive solution or treatment with Irradiation, mirasol, or intercept on the ability of platelets to mediate microRNA function. The figure shows the percentage of miR-223 sensor RNA substrate cleaved by platelet Ago2•miR-223 complexes, which is known to mediate platelet microRNA function [11]. RISC activity assays were performed by coincubating a 32P-labeled RNA sensor perfectly complementary to miR-223 with protein extracts from platelets collected from PCs at 1, 4, and 7 days of storage after treatment with additive solution, Irradiation, mirasol, intercept, or no treatment (control). For each group and time point, the figure shows the individual data (n = 4 donors per group), along with their median.