To confirm this hypothesis, another tumour cell mixture, Kpc1199Mix-I, containing equal amounts of Kpc1199Robo1-FL/GFP and Kpc1199ΔRobo1/mCherry cells, or the mixture Kpc1199Mix-II, containing equal amounts of Kpc1199Robo1-FL/GFP and Kpc1199CTRL/mCherry cells, was utilized in Slit2/CKO or WT mouse models (Fig. 5i). Here, SLIT2 is linked to neoplasm.