KDR and neoplasm: We evaluated CRATER proximity to tumor vasculature by imaging tumors grown in Tg(flk1:EGFP; fli1a:dsRed) zebrafish, marking blood vessels.19 scRNA-seq of sorted fli1a+/flk+ and fli1a+/flk− cells showed that fli1a+/flk− endothelial cells correspond to venous and lymphatic cells and fli1a+/flk+ represent a mix of venous and arterial endothelial cells (Figures S2G–S2J).