Chromatin immunoprecipitation assays were performed with SimpleChIP enzymatic ChIP kit (Cell Signaling) with anti-FoxO1 (SantaCruz) as described [72 (link)]. The immunoprecipitated DNA subjected to RT-PCR analysis with iTaq Universal SYBR Green Supermix (Bio-Rad) using the primer (SABiosciences, catalog no. GPM1030787(-)02A) that amplify a region of the mouse irf4 promoter containing the predicted FoxO1 binding sites. Data were analyzed with the LightCycler 480 software. The results were normalized to control IgG and input DNA.
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