POLD1 and neoplasm: Using previously identified iron‐interacting proteins to compare the individual genes in these two pathways,[8] we noticed that the gene expression of cyclin dependent kinase 1 (CDK1) and POLD1 were decreased 4.02‐ and 4.31‐fold by DFO in tumor colonoids, respectively (Figure 4A; and Tables S1, S3, and S4, Supporting Information).