Finally, 3 μM of VKNG-2 did not significantly reverse the resistance of (1) SW620/AD300 cancer cells, which overexpress ABCB1 transporter, to doxorubicin (Figure 3B), (2) HEK 293/ABCC1 cells, overexpressing the ABCC1 transporter, to vincristine (Figure 3D). This evidence concerns the gene ABCC1 and cancer.