Antibody:	MEC 13.3
Detection system:	Secondary antibody coupled to alkaline phosphatase

Structure	Level	Pattern	Image	Note
TS15: blood vessel	Present		2J +/+
TS15: branchial arch artery	Present		2J +/+
TS15: dorsal aorta	Present		2J +/+
TS15: intersomitic artery	Present		2J +/+

Structure	Level	Pattern	Image	Note
TS15: branchial arch artery	Present		2J -/-	Blood vessels, such as these, are poorly developed in the mutant.
TS15: dorsal aorta	Present		2J -/-	Blood vessels, such as these, are poorly developed in the mutant.
TS15: intersomitic artery	Present		2J -/-	Blood vessels, such as these, are poorly developed in the mutant.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic vascular system	Present		3B	Expressed in blood vessels.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic vascular system	Present		3C	No defined vasculatures could be observed in the mutant, only enlarged channels, which contained few blood cells.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic vascular system	Present		3D	Expression is seen in large vitelline vasculatures.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic vascular system	Present		3E	No defined vasculatures could be observed in the mutant, only enlarged channels, which contained few blood cells.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic vascular system	Present		3F	Expression is observed in a fine network of small vessels.

Structure	Level	Pattern	Image	Note
TS15: extraembryonic vascular system	Present		3G	No defined vasculatures could be observed in the mutant, only enlarged channels, which contained few blood cells.