IHC staining of YTHDF1, Ki67 and UHRF1 revealed that the abundance of YTHDF1 and UHRF1 proteins, as well as the percentage of Ki67 positive cells was upregulated in tumour tissues derived from the YTHDF1‐overexpressing NOZ cell line and downregulated in those derived from the YTHDF1‐downregulated NOZ cell line (Figure 4D). The gene discussed is MKI67; the disease is neoplasm.