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Individual CpG methylation map of the HSPB2 promoter. Individual CpG site methylation was mapped in five normal esophageal tissues from patients without cancer (Eso NN) (A), 12 ESCC cell lines (B), and 20 pairs of ESCC (PT) and matched normal esophageal tissues (PN) (C). Black circle, methylayed CpG; white circle, unmethylated CpG.
