hNCCs from the control and treated groups were harvested, and nuclear extracts were isolated by using the EpiQuik Nuclear Extraction Kit (Epigentek, Farmingdale, NY) according to the manufacturer’s protocol. The protein concentrations of nuclear extraction were measured using the BCA protein assay kit (Thermo Scientific, Irvine, CA). DNMT activity was determined with an EpiQuik DNA Methyltransferase Activity Assay kit (Epigentek, Farmingdale, NY), following the manufacturer’s instruction.
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