Probe:	Fgfr1 cDNA2
Probe preparation:	Antisense labelled with S35 RNA

Structure	Level	Pattern	Image	Note
TS15: limb mesenchyme	Present	Diffuse
TS15: dermatome	Present
TS15: sclerotome	Present
TS15: tracheal diverticulum mesenchyme	Present
TS15: myotome	Absent

Structure	Level	Pattern	Image	Note
TS17: limb mesenchyme	Present	Diffuse	2B
TS17: future spinal cord	Present	Regionally restricted	2B	Expression was detected in the ventral horns and at lower levels in the ventricular layer.

Structure	Level	Pattern	Image	Note
TS20: forelimb pre-cartilage condensation	Present		2E

Structure	Level	Pattern	Image	Note
TS24: dermis	Present	Regionally restricted	3B	Expression was confined to a tight band of dermal mesenchymal cells just below the epidermis.
TS24: vibrissa	Present	Regionally restricted	3B	Expression was detected in the dermal papilla but was not detected in the hair bulb.
TS24: vibrissa bulb	Absent		3B

Structure	Level	Pattern	Image	Note
TS24: dermis	Present	Regionally restricted	3D	Expression was confined to a tight band of dermal mesenchymal cells just below the epidermis.

Structure	Level	Pattern	Image	Note
TS20: lung mesenchyme	Present		4B

Structure	Level	Pattern	Image	Note
TS24: lung mesenchyme	Weak		4E

Structure	Level	Pattern	Image	Note
TS24: esophagus mesenchyme	Present		5B
TS24: trachea mesenchyme	Present		5B

Structure	Level	Pattern	Image	Note
TS20: stomach mesenchyme	Present		5E

Structure	Level	Pattern	Image	Note
TS24: stomach mesenchyme	Present		5H

Structure	Level	Pattern	Image	Note
TS17: dermatome	Present		6B
TS17: esophagus mesenchyme	Present		6B
TS17: sclerotome	Present		6B
TS17: trachea mesenchyme	Present		6B
TS17: myotome	Absent		6B
TS17: future spinal cord	Present	Regionally restricted	6B	Expression was detected in the ventral horns and at lower levels in the ventricular layer.

Structure	Level	Pattern	Image	Note
TS20: esophagus mesenchyme	Present		6E
TS20: trachea mesenchyme	Present		6E
TS20: sclerotome	Present	Regionally restricted	6E	Expression was detected in the caudal half of the sclerotome.

Structure	Level	Pattern	Image	Note
TS24: renal tubule	Present		7B
TS24: Bowman's capsule of maturing renal corpuscle	Present	Regionally restricted	7B	Expression was detected in Bowman's capsule epithelium.
TS24: mesenchyme of metanephros	Present	Regionally restricted	7B	Expression was detected in cortical mesenchyme.

Structure	Level	Pattern	Image	Note
TS24: long bone	Present	Regionally restricted	8B	Expression was detected in the hypertrophied cartilage, osteocytes and osteoblasts.
TS24: limb musculature	Weak		8B

Structure	Level	Pattern	Image	Note
TS24: incisor enamel organ	Strong	Regionally restricted	8E	Expression was high in the ameloblast layer.
TS24: incisor dental papilla	Strong	Regionally restricted	8E	Abundant expression was in the odontoblast layer and the underlying mesenchyme.

Structure	Level	Pattern	Image	Note
TS20: endocardial cushion	Moderate		9B
TS20: cardiac muscle tissue	Weak		9B
TS20: dorsal aorta	Present	Regionally restricted	9B	Expression was detected in the endothelium and smooth muscle.

Structure	Level	Pattern	Image	Note
TS24: endocardial cushion	Weak		9E
TS24: cardiac muscle tissue	Weak	Diffuse	9E
TS24: aorta	Weak	Regionally restricted	9E	Expression was detected in the endothelium and smooth muscle.

Structure	Level	Pattern	Image	Note
TS15: future brain	Present	Regionally restricted	10B	Uniform expression was detected in the ventricular layer throughout the developing brain.

Structure	Level	Pattern	Image	Note
TS17: brain ventricular layer	Present	Uniform		Uniform expression was detected in the ventricular layer throughout the developing brain.

Structure	Level	Pattern	Image	Note
TS24: brain ventricular layer	Present		10E
TS24: hippocampus	Present		10E
TS24: hippocampal formation	Present	Regionally restricted	10E	Expression was detected in maturing neuronal populations in the dentate gyrus.

Structure	Level	Pattern	Image	Note
TS24: brainstem	Present		10H
TS24: cerebellum	Present		10H

Structure	Level	Pattern	Image	Note
TS24: trigeminal ganglion	Present		10K