Fig. 2: Characterization of DNA 6mA in GSCs and glioblastoma cell lines by heavy stable isotope tracer [15N5]-dA.

a Flow diagram of tracing methylase-deposited DNA 6mA in glioma cells by [15N5]-dA. b UHPLC-MS/MS chromatograms of the labeled dA and 6mA in the genome of glioma stem cells (GSCs). c, d Quantification of the labeled dA (c) and 6mA (d) in the genomic DNA of human GSCs and human glioblastoma cell lines. ND, not detectable.