Antibody:	K5701
Detection system:	Secondary antibody coupled to horseradish peroxidase

Structure	Level	Pattern	Image	Note
TS16: dorsal aorta	Present	Clusters	1A	Expression was in clusters of hemopoietic cells on the floor of the dorsal aorta.
TS16: gut dorsal mesentery	Present	Clusters	1A
TS16: umbilical artery	Present	Clusters	1A
TS16: blood vessel	Present		1A

Structure	Level	Pattern	Image	Note
TS16: umbilical artery	Present	Clusters	1B

Structure	Level	Pattern	Image	Note
TS16: umbilical artery	Present	Clusters	1D	Expression was detected in a cluster that appears to be emerging from the endothelium. Some cells were detected in the lumen.

Structure	Level	Pattern	Image	Note
TS16: yolk sac	Present	Regionally restricted	1E	Expression was detected in cells within the lumen of a flat vessel.

Structure	Level	Pattern	Image	Note
TS16: yolk sac	Present	Regionally restricted	1F	Expression was detected in a blood island.

Structure	Level	Pattern	Image	Note
TS17: liver	Present	Non-Uniform	2A , 2B	Expression was detected in numerous cells.

Structure	Level	Pattern	Image	Note
TS19: liver	Present		2C	Positive cells were abundant at E11.5.

Structure	Level	Pattern	Image	Note
TS21: liver	Present		2D	Most of the positive cells exhibited cytologic features of megakaryocytes.