Probe:	ActR-IB cDNA1
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS20: cerebral cortex	Strong	Regionally restricted	7A	Expression is as a sharp boundary in the anteromedial part.
TS20: diencephalon	Strong		7A
TS20: metencephalon floor plate	Strong		7A
TS20: medulla oblongata part of 4th ventricle choroid plexus	Absent		7A
TS20: metencephalon part of 4th ventricle choroid plexus	Absent		7A
TS20: head mesenchyme	Absent		7A	Expression is absent in the condensation of mesenchyme forming the outer table of the primitive ectomeninx.

Structure	Level	Pattern	Image	Note
TS20: trigeminal ganglion	Present		7B
TS20: vagus ganglion	Present		7B
TS20: vestibulo-cochlear ganglion complex	Present		7B
TS20: central nervous system nerve	Present		7B	Expression is in the facial nerve (VII).
TS20: spinal cord mantle layer	Present		7B
TS20: spinal cord marginal layer	Present		7B
TS20: neural retinal epithelium	Present	Regionally restricted	7B	Expression is in the inner nuclear layer.

Structure	Level	Pattern	Image	Note
TS20: body wall	Present		7C
TS20: dorsal root ganglion	Present		7C
TS20: olfactory epithelium	Present		7C
TS20: pharynx	Present		7C
TS20: spinal cord mantle layer	Present		7C
TS20: spinal cord marginal layer	Present		7C
TS20: vomeronasal organ	Present		7C
TS20: mandibular process	Present	Regionally restricted	7C	Expression is in the upper and lower dental lamina.
TS20: maxillary process	Present	Regionally restricted	7C	Expression is in the upper and lower dental lamina.
TS20: oral region	Present	Regionally restricted	7C	Expression is in the submandibular gland.

Structure	Level	Pattern	Image	Note
TS20: dorsal root ganglion	Present		7D
TS20: esophagus	Present		7D
TS20: spinal cord mantle layer	Present		7D
TS20: spinal cord marginal layer	Present		7D
TS20: sympathetic ganglion	Present	Regionally restricted	7D	Expression is in the cervico-thoracic ganglion.

Structure	Level	Pattern	Image	Note
TS20: dorsal root ganglion	Present		7E
TS20: esophagus	Present		7E
TS20: spinal cord mantle layer	Present		7E
TS20: spinal cord marginal layer	Present		7E
TS20: sympathetic ganglion	Present	Regionally restricted	7E	Expression is in the cervico-thoracic ganglion.

Structure	Level	Pattern	Image	Note
TS20: dorsal root ganglion	Present		7F
TS20: hindgut	Present		7F
TS20: lung epithelium	Present		7F
TS20: midgut	Present		7F
TS20: spinal cord mantle layer	Present		7F
TS20: spinal cord marginal layer	Present		7F
TS20: stomach epithelium	Present		7F

Structure	Level	Pattern	Image	Note
TS20: dorsal root ganglion	Present		7G
TS20: gonad	Present		7G
TS20: hindgut	Present		7G
TS20: midgut	Present		7G
TS20: pancreas	Present		7G
TS20: spinal cord mantle layer	Present		7G
TS20: spinal cord marginal layer	Present		7G
TS20: ureter	Present	Regionally restricted	7G	Expression is in the epithelial lining of the primitive urethral lumen.

Structure	Level	Pattern	Image	Note
TS20: spinal cord mantle layer	Present		7H
TS20: spinal cord marginal layer	Present		7H
TS20: telencephalon	Present		7H
TS20: axial skeleton	Present	Regionally restricted	7H	Expression is in the intervertebral disks.

Structure	Level	Pattern	Image	Note
TS20: body wall	Present		8A
TS20: dorsal root ganglion	Present		8A
TS20: olfactory epithelium	Present		8A

Structure	Level	Pattern	Image	Note
TS20: neural retinal epithelium	Present	Regionally restricted	8B	Expression is in the inner nuclear layer.
TS20: body wall	Present		8B
TS20: dorsal root ganglion	Present		8B
TS20: gonad	Present		8B
TS20: hindgut	Present		8B
TS20: midgut	Present		8B
TS20: pancreas	Present		8B
TS20: stomach epithelium	Present		8B

Structure	Level	Pattern	Image	Note
TS20: pons	Strong
TS20: midbrain	Strong	Regionally restricted		Expression is in the tegmentum.
TS20: 4th ventricle	Present
TS20: body wall	Present
TS20: hypothalamus	Present
TS20: inferior glossopharyngeal ganglion	Present
TS20: thalamus	Present
TS20: head	Present	Regionally restricted		Expression is in the dorsal component of the first branchial arch.
TS20: cerebral cortex	Present	Regionally restricted		Expression is in the region of the future olfactory lobe.
TS20: medulla oblongata part of 4th ventricle choroid plexus	Absent
TS20: metencephalon part of 4th ventricle choroid plexus	Absent
TS20: head mesenchyme	Absent			Expression is absent in the condensation of mesenchyme forming the outer table of the primitive ectomeninx.
TS20: endolymphatic sac	Absent			Expression is absent in the rostral extremity.
TS20: trigeminal nerve	Absent