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. 2022 Oct 11;22:310. doi: 10.1186/s12935-022-02720-w

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Fig. 1 — Methylation status in NIS promoter. a The probable promoter sequence checked for the presence of the most frequent CpG islands for the NIS gene and suggested primers from the MethPrimer website. b Structure of the human NIS promoter gene and the selected seven CpG positions