Probe:	Rar-beta-1/3 cDNA1
Probe preparation:	Antisense labelled with S35 RNA

Structure	Level	Pattern	Image	Note
TS13: embryo	Present	Diffuse	1A/B
TS13: future brain	Present		1A/B	Slightly stronger signals in the region of the closing neural tube.
TS13: neural tube	Present		1A/B	Slightly stronger signals in the region of the closing neural tube.

Structure	Level	Pattern	Image	Note
TS15: branchial arch mesenchyme	Present		1D/E
TS15: fronto-nasal process mesenchyme	Present		1D/E
TS15: future spinal cord	Present		1D/E

Structure	Level	Pattern	Image	Note
TS17: future spinal cord	Present	Regionally restricted	2D/E	Expression is from the posterior neuropore to the caudal hindbrain.
TS17: rhombomere 7	Present		2D/E
TS17: rhombomere 8	Present		2D/E
TS17: pericardio-peritoneal canal	Weak		2D/E
TS17: trunk	Weak	Regionally restricted	2D/E	Expression is in the umbilical region.

Structure	Level	Pattern	Image	Note
TS19: future spinal cord	Strong		3A/B
TS19: hindbrain	Strong	Regionally restricted	3A/B	Expression is caudal.
TS19: head mesenchyme	Present	Regionally restricted	3A/B	Expression is in the mesenchyme of the olfactory and eye regions.
TS19: carina trachea mesenchyme	Present		3A/B
TS19: esophagus mesenchyme	Present		3A/B
TS19: midgut loop mesenchyme	Present		3A/B
TS19: oral epithelium	Present		3A/B
TS19: bulbar ridge	Present	Regionally restricted	3A/B	Expression is in the conotruncal mesenchyme.
TS19: blood vessel	Present	Regionally restricted	3A/B	Expression is in the walls of the umbilical vessels.

Structure	Level	Pattern	Image	Note
TS19: hindbrain	Strong	Regionally restricted	4A/B	Expression is in the ventricular layer of the alar (dorsal) plate and in the ventral horns.

Structure	Level	Pattern	Image	Note
TS19: future spinal cord	Present		4D/E	Expression is in the dorsal spinal cord.

Structure	Level	Pattern	Image	Note
TS19: stomach mesenchyme	Present

Structure	Level	Pattern	Image	Note
TS21: axial skeleton	Present	Regionally restricted	5D/E	Expression is in the intervertebral discs.
TS21: carina trachea epithelium	Present		5D/E
TS21: esophagus epithelium	Present		5D/E
TS21: lobar bronchus mesenchyme	Present		5D/E
TS21: pancreas	Present		5D/E
TS21: stomach mesenchyme	Present		5D/E
TS21: umbilical artery	Present		5D/E
TS21: outflow tract	Present	Regionally restricted	5D/E	Expression is in the mesenchyme.
TS21: genital tubercle	Present	Regionally restricted	5D/E	Expression is in proximal genital tubercle mesenchyme.
TS21: alar columns	Strong		5D/E
TS21: basal columns	Strong	Regionally restricted	5D/E	Expression is in the ventral-most cells of the ventral horns.

Structure	Level	Pattern	Image	Note
TS21: pituitary gland	Present		6C

Structure	Level	Pattern	Image	Note
TS21: corpus striatum	Present		6G

Structure	Level	Pattern	Image	Note
TS21: corpus striatum	Present	Regionally restricted	6K

Structure	Level	Pattern	Image	Note
TS21: head mesenchyme	Weak	Regionally restricted	7A/B	Expression is in periocular mesenchyme.
TS21: nasal cavity	Weak	Regionally restricted	7A/B	Expression is in olfactory mesenchyme.

Structure	Level	Pattern	Image	Note
TS21: nasal cavity	Present		7D/E

Structure	Level	Pattern	Image	Note
TS21: carina trachea mesenchyme	Present		7G/H
TS21: carina trachea epithelium	Present	Regionally restricted	7G/H	Expression is absent in the ventral area.

Structure	Level	Pattern	Image	Note
TS21: foot	Present	Regionally restricted	8D/E	Expression is in proximal areas.