Probe:	VEGFR1/flt-1 probe
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS11: yolk sac mesoderm	Present		2A/B
TS11: amnion	Present		2A/B
TS11: chorion mesoderm	Present		2A/B
TS11: ectoplacental cone	Present		2A/B	Expression is present in proximal cells; this appears as a layer of cells in the ectoplacenta.
TS11: allantois mesoderm	Present		2C/D , 2A/B	Expression is present in the extra-embryonic mesenchyme in the region of the allantoic bud.
TS11: embryo ectoderm	Absent		2C/D , 2A/B
TS11: embryo endoderm	Absent		2C/D , 2A/B

Structure	Level	Pattern	Image	Note
TS28: blood vessel	Present	Regionally restricted	2A/B	Expression is present in the blood vessels of the decidua.
TS28: decidua	Present	Regionally restricted	2A/B	Expression is present in the blood vessels of the decidua.

Structure	Level	Pattern	Image	Note
TS28: decidua	Present	Regionally restricted	3A/B	Expression is present in the blood vessels of the decidua.

Structure	Level	Pattern	Image	Note
TS15: yolk sac mesenchyme	Present		4A/B
TS15: spongiotrophoblast	Present		4A/B
TS15: dorsal aorta	Present		4A/B , 4C/D
TS15: blood vessel	Present		4C/D , 4A/B	Areas of expression include the perineural vascular plexus in the periphery of the neural tube.
TS15: limb	Present		4C/D , 4A/B

Structure	Level	Pattern	Image	Note
TS15: yolk sac mesenchyme	Present	Regionally restricted	4E/F	Expression is present in the blood islands, in the perpheral endothelial cell precursors.
TS15: blood	Absent		4E/F

Structure	Level	Pattern	Image	Note
TS22: spongiotrophoblast	Strong		4G/H	There is strong expression in the spongiotrophoblast layer in the outer placenta.
TS22: labyrinthine zone	Weak		4G/H	There is weak expression in the labyrinthine layer of the inner placenta.

Structure	Level	Pattern	Image	Note
TS19: dorsal aorta	Present	Regionally restricted	5A/B	Expression is present in the inner cell lining (the endothelium).
TS19: blood vessel	Present	Widespread	5A/B	Expression is present in intersomitic capillaries, which sprout from the dorsal aorta, as well as in most, if not all, blood vessels and capillaries of developing organs.

Structure	Level	Pattern	Image	Note
TS22: blood vessel	Present	Widespread		Expression is present in most, if not all, blood vessels and capillaries of developing organs.

Structure	Level	Pattern	Image	Note
TS25: blood vessel	Present	Widespread		Expression is present in most, if not all, blood vessels and capillaries of developing organs.

Structure	Level	Pattern	Image	Note
TS25: endocardial tissue	Present		5D
TS25: blood vessel	Present		5F , 5D	Areas of the expression include the capillaries of the heart and in blood vessels between the vertebrae and ribs.
TS25: descending aorta	Present		5D	Expression is present in the endothelium.
TS25: lung	Present		5D	Expression is present in vascular structures.
TS25: skin	Present		5D	Expression is present in vascular structures.
TS25: thymus	Present		5D	Expression is present in vascular structures.

Structure	Level	Pattern	Image	Note
TS25: blood vessel	Present		5G/H
TS25: heart septum	Present		5G/H

Structure	Level	Pattern	Image	Note
TS25: blood vessel	Present		5K/L	Expression is present in the capillaries in the intestinal crypts.

Structure	Level	Pattern	Image	Note
TS25: intestine	Present		5M

Structure	Level	Pattern	Image	Note
TS19: blood vessel	Present		6A/B	Expression is present in the perineural vascular complex.
TS19: brain	Present		6A/B	Expression is present in vessels in the neuroectoderm.

Structure	Level	Pattern	Image	Note
TS25: blood vessel	Present		6C	Expression is present in the perineural vascular plexus and in the capillary sprouts in the developing brain.

Structure	Level	Pattern	Image	Note
TS28: capillary	Present		6F/G	Expression is present in capillaries in the brain.

Structure	Level	Pattern	Image	Note
TS23: blood vessel	Present		6H/I	Expression is present in the choroid plexus endothelium.

Structure	Level	Pattern	Image	Note
TS28: blood vessel endothelium	Present			Expression is present in the endothelium of the choroid plexus.
TS28: choroid plexus	Present			Expression is present in the endothelium of the choroid plexus.