MERTK and neoplasm: To evaluate the effect of MerTK overexpression on tumor growth in vivo, 4T1 and EMT6 Vector and MerTK clones were inoculated bilaterally onto the flanks of NCG, athymic nude, and syngeneic (BALB/c) mice (n=8–16 tumors per group) by subcutaneous injection and tumor growth was measured over 21–30 days.