Probe:	Notch4 cDNA3
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS13: head mesenchyme	Present		3A	Expression in cephalic mesenchyme.
TS13: dorsal aorta	Present	Widespread	3A	Expression in dorsal aorta throughout embryo body.
TS13: endocardial tube	Present		3A	Expression in endocardium.
TS13: yolk sac mesenchyme	Absent		3A	No expression in yolk sac mesoderm.

Structure	Level	Pattern	Image	Note
TS15: blood vessel	Present	Regionally restricted	3B	ExpressIon in anterior/posterior cardinal veins, intersegmental vessels and vessels in branchial arches.
TS15: endocardial lining	Weak		3B	Weak expression in endocardium.

Structure	Cell Type	Level	Pattern	Image	Note
TS17: vascular plexus	blood vessel endothelial cell	Present	Regionally restricted	3C	Expression in endothelial cells forming capillary plexuses.
TS17: head blood vessel		Strong		3C	Blood vessels in head and heart became more intensely labeled.
TS17: heart blood vessel		Strong		3C	Blood vessels in head and heart became more intensely labeled.
TS17: limb bud		Present		3C	Expression detected in limb buds.

Structure	Level	Pattern	Image	Note
TS13: dorsal aorta	Present		4A
TS13: heart	Present		4A
TS13: vitelline vein	Present		4A

Structure	Level	Pattern	Image	Note
TS15: yolk sac blood vessel	Present		4B	Expression in heart, vitelline vein and dorsal aorta.

Structure	Cell Type	Level	Pattern	Image	Note
TS15: anterior cardinal vein	blood vessel endothelial cell	Present		4C

Structure	Level	Pattern	Image	Note
TS17: intersomitic blood vessel	Present		4D
TS17: vascular plexus	Present	Regionally restricted	4D	Expression in capillary plexuses.

Structure	Level	Pattern	Image	Note
TS13: allantois	Present			Expression in allantois and allantoic stalk.