Probe:	Fgf7 probe
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS13: heart	Present			Earliest expression in the developing heart.

Structure	Level	Pattern	Image	Note
TS15: common atrial chamber	Strong			Expression increased with highest levels in the developing common atrial chamber.
TS15: primitive ventricle	Present			Lower levels of expression in the primitive ventricle.

Structure	Level	Pattern	Image	Note
TS17: heart atrium	Strong		2a	Highest levels of expression in the atrium.
TS17: primitive ventricle	Present		2a	Lower levels of expression in the primitive ventricle.
TS17: somite	Present		2a

Structure	Level	Pattern	Image	Note
TS17: heart atrium	Present	Regionally restricted	2b
TS17: bulbus cordis	Absent		2b
TS17: outflow tract	Absent		2b	No expression in truncus arteriosus.

Structure	Level	Pattern	Image	Note
TS17: cardiac muscle tissue	Present	Widespread	2c	Expression throughout the myocardium in both trabeculated and condensed regions.

Structure	Level	Pattern	Image	Note
TS17: endocardial cushion	Absent
TS17: sinus venosus	Absent

Structure	Level	Pattern	Image	Note
TS15: somite 06	Weak		3a
TS15: somite 07	Weak		3a

Structure	Level	Pattern	Image	Note
TS15: myotome	Weak	Regionally restricted		Low levels of expression first detected in myotomal cells in the most anterior 6 or 7 somites.

Structure	Level	Pattern	Image	Note
TS16: somite 06	Present		3b	Authors report increased levels of expression in myotomes of the most anterior somites.
TS16: somite 07	Present		3b	Authors report increased levels of expression in myotomes of the most anterior somites.

Structure	Level	Pattern	Image	Note
TS16: trunk somite	Present	Regionally restricted		Expression extended to somites 13 or 14.
TS16: myotome	Strong	Regionally restricted		Authors report increased levels of expression in myotomes of the most anterior somites.

Structure	Level	Pattern	Image	Note
TS17: trunk myotome	Present	Regionally restricted	3c/d	Expression exclusively in longitudinally oriented myotomal cells in rostral somites, not in rounded cells in a more dorsal location.

Structure	Level	Pattern	Image	Note
TS17: myotome	Present	Regionally restricted	3e/f

Structure	Level	Pattern	Image	Note
TS18: myotome	Present	Regionally restricted	3h/k	Expression confined to elongated myotomal cells of developing muscle masses. No expression in dorsal population of rounded myotomal cells.

Structure	Level	Pattern	Image	Note
TS19: myotome	Present			Authors report myotomal expression continues to increase until E11.5 (TS19).

Structure	Level	Pattern	Image	Note
TS18: forelimb bud	Weak		4a	Weak expression in proximal central region where first muscle masses condense.

Structure	Level	Pattern	Image	Note
TS20: myotome	Present	Widespread	4b
TS20: skeletal muscle	Present	Regionally restricted	4b	Expression in hypaxial muscles as far caudal as the thoracic region.

Structure	Level	Pattern	Image	Note
TS19: trunk myotome	Present	Regionally restricted	4d	Expression within somitic myotomal muscle and in a tongue of myotome extending ventrally into the somatopleure.

Structure	Level	Pattern	Image	Note
TS20: skeletal muscle	Present	Regionally restricted	4e	Expression in brachial epaxial muscles.

Structure	Level	Pattern	Image	Note
TS20: tongue muscle	Present	Regionally restricted	4f

Structure	Level	Pattern	Image	Note
TS20: skeletal muscle	Present	Regionally restricted		Expression in developing muscles of the snout and pelvis.

Structure	Level	Pattern	Image	Note
TS22: skeletal muscle	Present		4g/h
TS22: diaphragm	Present		4g/h
TS22: lung mesenchyme	Present		4g/h
TS22: nasal mesenchyme	Present		4g/h
TS22: telencephalon ventricular layer	Present	Regionally restricted	4g/h	Expression in ventricular zone of anterior horn of lateral ventricle of forebrain which generates the frontal cortical lobe.

Structure	Level	Pattern	Image	Note
TS22: tail myotome	Present
TS22: limb musculature	Present

Structure	Level	Pattern	Image	Note
TS24: skeletal muscle	Absent		4j/k

Structure	Level	Pattern	Image	Note
TS24: limb musculature	Present	Regionally restricted		Expression still observed in certain muscles of the tongue and developing muscles of the digits.
TS24: tongue muscle	Present	Regionally restricted		Expression still observed in certain muscles of the tongue and developing muscles of the digits.

Structure	Level	Pattern	Image	Note
TS21: forebrain	Absent

Structure	Level	Pattern	Image	Note
TS22: forebrain	Present	Regionally restricted	5a/b	Expression within a restricted area of the ventricular zone of the forebrain.

Structure	Level	Pattern	Image	Note
TS22: cerebral cortex ventricular layer	Present	Regionally restricted	5c	Expression in the ventricular zone in the region of the presumptive parietal cortex.

Structure	Level	Pattern	Image	Note
TS22: ganglionic eminence ventricular zone	Present

Structure	Level	Pattern	Image	Note
TS23: forebrain	Absent

Structure	Level	Pattern	Image	Note
TS24: lung mesenchyme	Present		6a

Structure	Level	Pattern	Image	Note
TS28: lung	Present	Regionally restricted	6b	Expression in lung mesenchyme surrounding bronchiole.

Structure	Level	Pattern	Image	Note
TS24: submandibular gland mesenchyme	Present		6c

Structure	Level	Pattern	Image	Note
TS24: duodenum	Present	Regionally restricted	6d	Expression in the submucosa of the esophagus, stomach and duodenum.
TS24: esophagus	Present	Regionally restricted	6d	Expression in the submucosa of the esophagus, stomach and duodenum.
TS24: stomach	Present	Regionally restricted	6d	Expression in the submucosa of the esophagus, stomach and duodenum.
TS24: diaphragm	Present	Regionally restricted	6d	Expression in the diaphragm, prominent within the fibrous region, but largely excluded from muscular regions.

Structure	Level	Pattern	Image	Note
TS28: ileum	Present	Regionally restricted	6e	Expression in the submucosa and in the tips of the villi.

Structure	Level	Pattern	Image	Note
TS24: diaphragm	Present	Regionally restricted	6f	Expression in the diaphragm, prominent within the fibrous region, but largely excluded from muscular regions.

Structure	Level	Pattern	Image	Note
TS24: forelimb digit mesenchyme	Present	Regionally restricted	6g	Expression in the external fibrous later of perichondrium, adjacent to proliferating chondrocytes.
TS24: limb musculature	Present	Punctate	6g	Expression in some muscles of the digits.

Structure	Level	Pattern	Image	Note
TS24: rib	Present	Regionally restricted	6h	Expression in the external fibrous layer of perichondrium.

Structure	Level	Pattern	Image	Note
TS22: nasal mesenchyme	Present	Regionally restricted	6i	High levels of expression in nasal region mucosa beneath the olfactory epithelium.

Structure	Level	Pattern	Image	Note
TS24: bladder	Present	Regionally restricted	6j	Expression in bladder mesenchymal cells.

Structure	Level	Pattern	Image	Note
TS24: ureter	Present	Regionally restricted	6k	Expression in mesenchymal cells in inner mucosal layer.

Structure	Level	Pattern	Image	Note
TS28: mesenchymal stroma of ovary	Present	Regionally restricted	6l	Expression in medullary stroma of the ovary.

Structure	Level	Pattern	Image	Note
TS24: vibrissa	Present	Regionally restricted	6m/n	Expression in mesenchyme surrounding vibriss; no expression in root sheath and muscle of whisker follicle.

Structure	Level	Pattern	Image	Note
TS24: dermis	Present		6p/q

Structure	Level	Pattern	Image	Note
TS28: pancreas	Present	Regionally restricted		Expression in pancreatic mesenchyme.

Structure	Level	Pattern	Image	Note
TS28: testis	Absent