Probe:	pBS/KS-Id2sp
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS19: 1st branchial arch	Present		1_panel 2
TS19: Rathke's pouch	Present		1_panel 2
TS19: somite	Present		1_panel 2
TS19: trunk mesenchyme	Present	Regionally restricted	1_panel 2	Expression is in mesenchyme surrounding the dorsal side of the developing stomach.

Structure	Level	Pattern	Image	Note
TS19: sclerotome	Present	Regionally restricted	2C	Expression is in the rostral half of the sclerotome.

Structure	Level	Pattern	Image	Note
TS24: forelimb digit	Present	Regionally restricted	2H	Expression is in the hypertrophic cartilage region and in the bony diaphysis.
TS24: radius	Present	Regionally restricted	2H	Expression is in the hypertrophic cartilage region and in the bony diaphysis.

Structure	Level	Pattern	Image	Note
TS22: cranium	Present	Regionally restricted	2M	Expression is in the cranio-facial skeleton.
TS22: jaw skeleton	Present	Regionally restricted	2M	Expression is in the cranio-facial skeleton.
TS22: palatal shelf	Present	Regionally restricted	2M	Expression is in ossification centers.
TS22: Meckel's cartilage	Present		2M
TS22: hyoid cartilage primordium	Present		2M
TS22: nasal septum	Present		2M
TS22: otic capsule	Present		2M
TS22: sphenoid bone	Present		2M

Structure	Level	Pattern	Image	Note
TS20: hindlimb interdigital region mesenchyme	Present		2R
TS20: hindlimb pre-cartilage condensation	Present	Regionally restricted	2R	Expression is in the blastemal condenstaions where chondrification has started.

Structure	Level	Pattern	Image	Note
TS24: dental papilla	Present	Regionally restricted	3_panel 2	Expression is in the dental papilla mesenchyme and is absent in the ondontoblasts.
TS24: enamel organ	Present	Regionally restricted	3_panel 2	Expression is in the ameloblast layer.
TS24: stellate reticulum	Present		3_panel 2

Structure	Level	Pattern	Image	Note
TS24: vibrissa dermal papilla	Present		4A/C
TS24: vibrissa outer root sheath	Present		4A/C
TS24: vibrissa dermal component	Present	Regionally restricted	4A/C	Expression is in the dermal sheath region.

Structure	Level	Pattern	Image	Note
TS19: stomach mesenchyme	Present	Regionally restricted	5B	Expression is in mesenchyme surrounding the endoderm in the dorsal part.
TS19: stomach	Present	Regionally restricted	5B	Expression is in the stomach endoderm in the dorsal part.

Structure	Level	Pattern	Image	Note
TS22: intestine epithelium	Present		5G
TS22: intestine muscularis	Present		5G

Structure	Level	Pattern	Image	Note
TS24: bronchiole	Present	Regionally restricted	6A/D	Expression is in the newly emerging terminal bronchi/bronchioles.
TS24: bronchus	Present	Regionally restricted	6A/D	Expression is in the newly emerging terminal bronchi/bronchioles.
TS24: main bronchus	Absent		6A/D

Structure	Level	Pattern	Image	Note
TS22: metanephros	Present	Regionally restricted	6G/J	Expression is in the condensed metanephric mesenchyme.
TS22: collecting duct	Present		6G/J
TS22: glomerular capillary system of maturing glomerular tuft	Absent		6G/J

Structure	Level	Pattern	Image	Note
TS19: endocardial cushion	Strong		7_panel 2
TS19: atrioventricular endocardial cushion	Present		7_panel 2
TS19: outflow tract	Present		7_panel 2

Structure	Level	Pattern	Image	Note
TS19: brain blood vessel	Absent		8B/F

Structure	Level	Pattern	Image	Note
TS22: salivary gland epithelium	Present	Ubiquitous	9B/F

Structure	Level	Pattern	Image	Note
TS13: future brain neural fold	Present	Regionally restricted		Expression is in the ridges of the unclosed neural folds.
TS13: head mesenchyme	Present	Regionally restricted		Expression is in the cranial mesenchyme underlying the unclosed neural folds.

Structure	Level	Pattern	Image	Note
TS15: branchial arch	Present
TS15: limb	Present
TS15: trunk mesenchyme	Very strong	Regionally restricted		Expression is in the mesechyme surrounding the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS17: gut endoderm	Present
TS17: limb	Present
TS17: stomach	Present	Regionally restricted		Expression is in the stomach endoderm in the dorsal part.
TS17: stomach mesenchyme	Present	Regionally restricted		Expression is in mesenchyme surrounding the endoderm in the dorsal part.
TS17: trunk mesenchyme	Very strong	Regionally restricted		Expression is in the mesechyme surrounding the dorsal aorta.

Structure	Level	Pattern	Image	Note
TS19: nasal process	Present
TS19: stomach epithelium	Present
TS19: brain blood vessel	Absent

Structure	Level	Pattern	Image	Note
TS20: rib pre-cartilage condensation	Present	Regionally restricted		Expression is in the perichondrium.
TS20: jaw	Present	Regionally restricted		Expression is in the toothbud condensed mesenchymal cells.
TS20: vibrissa mesenchyme	Present	Regionally restricted		Expression is in the condensing mesenchyme underneath the epidermal placodes.
TS20: metanephros	Present	Regionally restricted		Expression is in the condensed metanephric mesenchyme and renal pelvis, absent in the ureteric bud.
TS20: pancreas	Present

Structure	Level	Pattern	Image	Note
TS22: stellate reticulum	Weak
TS22: tooth mesenchyme	Weak	Regionally restricted		Expression is in the condensed mesenchyme.
TS22: cap stage tooth	Weak	Regionally restricted

Structure	Level	Pattern	Image	Note
TS22: stomach mesenchyme	Present
TS22: stomach glandular region	Present	Regionally restricted		Expression is in the glandular mucosa.
TS22: stomach epithelium	Weak
TS22: hyaloid vascular plexus	Absent

Structure	Level	Pattern	Image	Note
TS24: bronchiole epithelium	Present
TS24: collecting duct	Present
TS24: glomerular capillary system of maturing glomerular tuft	Present
TS24: heart valve	Present
TS24: mesenchyme of metanephros	Present
TS24: renal convoluted tubule	Present
TS24: renal pelvis	Present
TS24: thyroid gland	Present
TS24: intestine	Trace
TS24: parathyroid gland	Absent