Probe:

Flt4 probe1

Structure	Level	Pattern	Image	Note
TS11: embryo	Absent		2A

Structure	Level	Pattern	Image	Note
TS13: posterior cardinal vein	Present	Regionally restricted	2B	Expression was detected in the endothelium of the posterior cardinal vein.
TS13: allantois	Present		2B

Structure	Level	Pattern	Image	Note
TS13: head mesenchyme	Present	Regionally restricted	2C	Expression was detected in angioblasts of the head mesenchyme.

Structure	Level	Pattern	Image	Note
TS13: dorsal aorta	Absent
TS13: heart	Absent

Structure	Level	Pattern	Image	Note
TS28: placenta	Present	Regionally restricted	2D	Expression was detected in endothelial cells of venous lacunae.
TS15: extraembryonic venous system	Present	Regionally restricted	2D	Expression was detected in peripheral sinusoidal veins.

Structure	Level	Pattern	Image	Note
TS19: dorsal aorta	Absent		2E
TS19: arterial system	Ambiguous		2E	Staining in the arterial endothelia was very weak, if at all.
TS19: venous system	Present		2E	Expression was detected in the developing veins. The veins surrounding the developing metanephros were noted.
TS19: subcardinal vein	Present		2E

Structure	Level	Pattern	Image	Note
TS19: anterior cardinal vein	Present

Structure	Level	Pattern	Image	Note
TS20: blood vessel	Present	Regionally restricted	3A/B	Expression was detected in a dilated vessel in the axillar region, in a plexus of vessels in the periorbital region, surrounding the developing vertebrae, and in a vascular network beneath the skin. Weak capillary signals were noted in several regions.
TS20: liver	Present	Spotted	3A/B

Structure	Level	Pattern	Image	Note
TS22: lymphatic system	Present	Regionally restricted	4A/B	Expression was detected in endothelial cells of the thoracic duct. Dilated vessels in the mesenteric region, and vessel networks in the periorbital, lower jaw, and neck regions were positive. The absence of red blood cells indicated lymphatic endothelium.
TS22: dorsal aorta	Absent		4A/B
TS22: inferior vena cava	Absent		4A/B

Structure	Level	Pattern	Image	Note
TS24: lymphatic system	Present	Scattered	4D	Expression was detected in endothelial cells of the thoracic duct and a small vessel in the vicinity.