Although it seems that expressions of DNMT1, UHRF1, and DNMT3A are also upregulated in OXPHOS inhibition‐sensitive cancer cells identified in our screen, only DNMT1 expression exhibits a significantly positive correlation with cancer cell sensitivity to OXPHOS inhibition (Figure 4D; Figures S4E–H and Figure S5A, Supporting Information). Here, DNMT1 is linked to cancer.