MERTK and melanoma: Similar to the studies on YUMM1.7 melanoma cells, when GL261 cells were implanted in Mertk-/-V2 and Mertk-/- V3 mice, and these mice were subsequently treated with DC-Vax, 100% of these mice failed to display the anti-GL261 response of Mertk-/-V1 mice (Figure 5D and E).