Probe:	Alk3 cDNA1
Probe preparation:	Antisense labelled with S35 RNA

Structure	Level	Pattern	Image	Note
TS9: embryo	Present	Ubiquitous
TS9: ectoplacental cone	Present
TS28: decidua	Present	Regionally restricted		Expression was detected in the implantation site in the decidua.

Structure	Level	Pattern	Image	Note
TS13: embryo	Present	Widespread	7	Expression was detected througout the embryo.
TS13: allantois	Present		7
TS13: amnion	Present		7
TS13: ectoplacental cone	Present		7
TS13: yolk sac	Present		7

Structure	Level	Pattern	Image	Note
TS20: heart	Present		8A
TS20: lung mesenchyme	Present		8A
TS20: mesenchyme of metanephros	Present		8A
TS20: mesonephros mesenchyme	Present		8A
TS20: blood vessel	Present	Regionally restricted	8A	Expression was detected in blood vessels within the heart.
TS20: intraembryonic coelom	Strong	Regionally restricted	8A	Strong expression was detected in the diaphragm.
TS20: brain	Present	Regionally restricted	8A	Expression was detected in the ependymal layers in the ventricles.
TS20: brain mantle layer	Weak		8A
TS20: spinal cord mantle layer	Weak		8A
TS20: dorsal root ganglion	Present		8A
TS20: head mesenchyme	Present	Regionally restricted	8A	Expression was detected in the mesenchyme of the snout.

Structure	Level	Pattern	Image	Note
TS20: lung mesenchyme	Present		8B
TS20: mesenchyme of metanephros	Present		8B
TS20: mesonephros mesenchyme	Present		8B
TS20: thymus primordium	Present	Regionally restricted	8B	Expression was detected in mesenchyme of the thymus.
TS20: liver	Absent		8B
TS20: brain	Present	Regionally restricted	8B	Expression was detected in the ependymal layers in the ventricles.
TS20: dorsal root ganglion	Present		8B

Structure	Level	Pattern	Image	Note
TS20: brain	Present	Regionally restricted	8C	Expression was detected in the ependymal layers in the ventricles.
TS20: dorsal root ganglion	Present		8C
TS20: embryonic fissure	Present		8C
TS20: remnant of Rathke's pouch	Present		8C
TS20: trigeminal ganglion	Present		8C

Structure	Level	Pattern	Image	Note
TS20: embryo mesenchyme	Present	Regionally restricted	8D	Expression was detected in the mesenchyme surrounding precartilage condensations.
TS20: gonad	Present		8D
TS20: hindgut	Present		8D
TS20: midgut mesenchyme	Present		8D
TS20: pancreas	Present		8D
TS20: gland	Present	Regionally restricted	8D	Expression was detected in the adrenal primordium.
TS20: dorsal root ganglion	Present		8D

Structure	Level	Pattern	Image	Note
TS20: jaw primordium	Present	Regionally restricted	9	Expression was detected in the dental lamina.
TS20: lens vesicle	Present		9
TS20: neural retinal epithelium	Present		9
TS20: brain	Present	Regionally restricted	9	Expression was detected in the ependymal layers in the ventricles.
TS20: trigeminal ganglion	Present		9

Structure	Level	Pattern	Image	Note
TS17: Rathke's pouch	Present

Structure	Level	Pattern	Image	Note
TS23: cartilage	Present		10B
TS23: skeleton	Present	Regionally restricted	10B	Expression was detected in the periosteum of ossified bones.
TS23: intervertebral disc	Strong		10B
TS23: vibrissa follicle	Present		10B

Structure	Level	Pattern	Image	Note
TS23: digit mesenchyme	Present	Regionally restricted		Expression was high in the cartilage of the digits.
TS23: thyroid gland	Present
TS23: gland	Present	Regionally restricted		Expression was detected in the lacrimal gland.