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A. Representative flow cytometric analysis of surface expression of phenotypic markers in ERCs. ERCs express CD105, CD90, while lacking of CD34, CD45. B. PD-L1 expression of ERCs was analyzed by using the FACS. Basal PD-L1 levels were found on ERCs and dose-dependently increased with the IFN-γ concentration (0.5-5 ng/mL). The result was representative in three separate experiments.
