Fig. 5. Grafts of early vascular rudiments. (A) Quail donors were at the 14ss. The boxed areas were dissected and grafted. The box labeled omv corresponds to the presumptive territory of the omphalomesenteric vein, while the box labeled oma corresponds to the territory of the omphalomesenteric artery. (B) QH1 (brown) and NRP1 (blue) double-staining of an E4 chick host that had received a graft (G) of territory oma 2 days before. Asterisks mark the connections of the graft to the host. QH1-positive/NRP1-positive EC are observed in the arterial system (arrows), including the aorta (Ao) and brachial artery (ba). QH1-positive/NRP1-negative cells are present in the venous system (arrowheads), including the posterior cardinal vein (cv), the subcardinal vein (scv), the umbilical vein (uv) and the peripheral plexus of the wing (W). M, mesonephros. Bar, 80 µm.
