(related to Fig. 5). Stromal-endothelial cell interactions during caudal vein plexus formation in control or pcdh18a-ΔCP106 morphant embryos Time-lapse confocal imaging of Tg(pax3a:GFP; kdrl:ras-mCherry) embryos from 26 to 36 hpf. Arrows indicate stromal-endothelial cell interactions in the control embryo, and solitary migration of stromal cells in the pcdh18a morphant. Scale bars, 20 μm.