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Knock‐down of GREM1 during Stage 2 inhibits proliferation, but promoted apoptosis. A, Ki67 expression was tested by immunofluorescence. B, Quantified data were analysed. C, Cell cycle was detected by FACS. D, Quantified data were analysed. E, Cell apoptosis was tested by PI/Annexin V. F, Quantified data were analysed. The data represent mean ± SEM of three independent experiments. *P < .05. Scale bar: 50 μm.
