To identify protein expression level of each gene in normal brain tissue and glioma, immunohistochemistry (IHC) were retrieved from the Human Protein Atlas database, which revealed the expression level of m6A methylation‐related proteins (No data found for ADCY3, DGCR8 and YTHDF3) (Figure S2A–F). This evidence concerns the gene DGCR8 and glioma.