SLC30A9 and cancer: In contrast, in primary human cervical epithelial cells (HCerEpC) and the immortalized Ect1/E6E7 epithelial cell, SLC30A9 knockdown via shSLC30A9-S2 (see Fig. 3) did not significantly elevate Caspase-3 activity (Fig. S4D) or nuclear TUNEL staining (Fig. S4E), nor did it induce cell death (Fig. S4F), further supporting the cancer cell-specific effect of SLC30A9 knockdown.