Probe:	Fgfr2IIIc cDNA3
Probe preparation:	Antisense RNA
Visualized with:	Autoradiography
Assay notes:	The probe used in this assay was specific for the bek isoform.

Structure	Level	Pattern	Image	Note
TS8: extraembryonic component	Weak
TS8: embryo	Absent			Authors believe that most of the embryo fails to express.

Structure	Level	Pattern	Image	Note
TS10: extraembryonic component	Present		2I/J	Expression was present in all three germ layers.
TS10: embryo	Weak		2I/J	Expression was diffusely distributed throughout the embryo, including all three germ layers.

Structure	Level	Pattern	Image	Note
TS13: lateral plate mesoderm	Present		4C/D
TS13: neural ectoderm	Present		4C/D
TS13: trunk somite	Present		4C/D

Structure	Level	Pattern	Image	Note
TS17: embryo	Present			Expression was diffuse.

Structure	Level	Pattern	Image	Note
TS20: embryo	Present		4G/H , 4I

Structure	Level	Pattern	Image	Note
TS22: vault of skull	Present		4L , 4J/K	Expression is present in the skull.
TS22: caudate nucleus	Present	Regionally restricted	4L , 4J/K	Expression is present in the neuroepithelium of the caudate putamen.

Structure	Level	Pattern	Image	Note
TS22: rib cartilage condensation	Present		5C
TS22: vertebral cartilage condensation	Present		5C
TS22: pelvic girdle skeleton	Present		5C	Expression is present in the ilium.
TS22: limb	Present	Regionally restricted	5C	Expression is present in the long bones of the limb.
TS22: facial bone primordium	Present		5C
TS22: naris	Present	Regionally restricted	5C	Expression is present in the bones of the nasal cavity.
TS22: liver	Present		5C	There is diffuse expression in the liver.
TS22: adrenal gland	Present		5C

Structure	Level	Pattern	Image	Note
TS22: dermis	Present		5F	Expression is present in the dermis of the thoracic area.
TS22: epidermis	Absent		5F
TS22: embryo mesenchyme	Present	Regionally restricted	5F	Expression is present in the loose mesenchyme under the dermis.

Structure	Level	Pattern	Image	Note
TS22: mitral valve	Present		5I	Expression is present in the atrioventricular heart valvues.
TS22: tricuspid valve	Present		5I	Expression is present in the atrioventricular heart valvues.

Structure	Level	Pattern	Image	Note
TS22: ossicle	Present		5L	Expression is present in the auditory ossicles.
TS22: inner ear	Present	Regionally restricted	5L	Expression is present in the bony part of the inner ear.
TS22: cochlear duct epithelium	Present		5L

Structure	Level	Pattern	Image	Note
TS22: lower jaw incisor enamel organ	Present	Regionally restricted	5O	Expression was present in the inner part of the organ.

Structure	Level	Pattern	Image	Note
TS22: lens epithelium	Present		5S
TS22: cornea stroma	Present		5S	Expression is present in the corneal mesenchyme.
TS22: facial bone primordium	Present		5S
TS22: naris	Present	Regionally restricted	5S	Expression is present in the bones of the nasal cavity.

Structure	Level	Pattern	Image	Note
TS22: nasal cavity epithelium	Present		5V
TS22: vibrissa	Present	Regionally restricted	5V	Expression is present in the outer root sheath.
TS22: dermis	Present		5V	Expression is in the dermis of the skin in the nasal region.
TS22: epidermis	Absent		5V	There is no expression in the epidermis of the skin in the nasal region.
TS22: embryo mesenchyme	Present	Regionally restricted	5V	Expression is present in the loose mesenchyme underlying the dermis.

Structure	Level	Pattern	Image	Note
TS22: humerus cartilage condensation	Present	Regionally restricted	5Y	Expression is present in the long bones of the limb.
TS22: radius cartilage condensation	Present	Regionally restricted	5Y	Expression is present in the long bones of the limb.
TS22: ulna cartilage condensation	Present	Regionally restricted	5Y	Expression is present in the long bones of the limb.
TS22: rib cartilage condensation	Present		5Y