KIT and neoplasm: In vivo therapy effect of KIT-d-MMAE and KIT-d-DM1 were studied when the tumor volume reached 80-120 mm3: mice were randomized into six groups (n = 5) and injected with DPBS, KIT-d, SMCC-DM1, KIT-d-DM1, VcMMAE or KIT-d-MMAE via tail vein twice a week for 5 times.