A, B C2C12 were depleted for Brm (siBrm), Brg1 (siBrg1), or a scrambled (siScr) sequence by small interfering RNA (siRNA) during proliferation (GM), and samples were analyzed at different time points during differentiation (DM 18 h and DM 48 h). Double EdU/MyHC staining was performed after incubation of EdU 12 h before fixing the cells (A). Scale bar, 50 μm. Percentage of EdU-positive cells was calculated counting 10 fields of EdU-positive cells (B, top graph). Proliferation analysis was performed by counting the number/field of siRNA-treated C2C12 at the time point indicated (B, middle graph) and by flow cytometry by BrdU incorporation (B, bottom graph) as percentage of BrdU+ cells. Data are presented as average ± SEM (n = 3).