Therefore, to investigate vessel functionality and the impact of bevacizumab on vessel normalization, we injected Hs578T cancer cells into Tg(fli1:eGFP; Tg(gata1:DsRed)48, in which erythrocytes are labeled with DsRed and the vascular system with eGFP (Fig. 3). The gene discussed is FLI1; the disease is cancer.