To this end, we examined the protein expression of ABCB1 in KB-V-1 cancer cells (Figure 3E) and ABCG2 in S1-M1-80 cancer cells (Figure 3F) after treating cells with increasing concentrations of TMP195 (0–5 μM) for 72 h, followed by immunoblotting as described in Section 4. The gene discussed is ABCB1; the disease is cancer.