EGF and colorectal carcinoma: Similar trends were observed in cell proliferation assays with EGF-stimulated USP21-KO CRC cells (Fig. 3G: USP21-KO HCT-15 vs. Ctrl HCT-15; Fig. 3H: USP21-KO HT-29 vs. Ctrl HT-29; Fig. S5: USP21-KO SW480 vs. Ctrl SW480).