Probe:	ErbB4 cDNA3
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS16: future spinal cord	Present	Regionally restricted	4M	Expression in two stripes of cells in the spinal cord.

Structure	Level	Pattern	Image	Note
TS20: spinal cord	Strong	Regionally restricted	4N	Expression in the ventral portion.
TS20: trunk mesenchyme	Weak	Regionally restricted	4N	Expression in skeletal muscles.

Structure	Level	Pattern	Image	Note
TS26: spinal cord	Present	Uniform	4O

Structure	Level	Pattern	Image	Note
TS26: brain	Strong		7E
TS26: telencephalon	Strong	Regionally restricted	7E	Expression in the cortical plate, ventricular zone and claustrum.
TS26: cortical plate	Strong		7E
TS26: midbrain	Strong	Regionally restricted	7E	Expression in various nuclei.

Structure	Level	Pattern	Image	Note
TS20: telencephalon ventricular layer	Absent
TS20: cerebral cortex	Strong
TS20: telencephalon	Strong	Regionally restricted		Expression in the olfactory lobes.
TS20: diencephalon	Strong
TS20: midbrain	Strong
TS20: medulla oblongata	Strong
TS20: pons	Strong
TS20: spinal cord	Strong
TS20: nasal cavity epithelium	Absent			Absent in the undifferentiated epithelium.
TS20: retina	Absent			Absent in the undifferentiated epithelium.
TS20: inner ear epithelium	Present			Present in the undifferentiated epithelium.
TS20: sympathetic ganglion	Absent
TS20: skeletal muscle	Present
TS20: cardiac muscle tissue	Strong
TS20: atrioventricular endocardial cushion	Absent
TS20: endocardial cushion	Absent
TS20: right atrium valve	Absent
TS20: endocardial lining	Absent

Structure	Level	Pattern	Image	Note
TS23: telencephalon ventricular layer	Absent
TS23: cerebral cortex	Strong
TS23: olfactory lobe	Strong
TS23: corpus striatum	Strong
TS23: diencephalon	Strong
TS23: midbrain	Strong
TS23: medulla oblongata	Strong
TS23: pons	Strong
TS23: spinal cord	Strong
TS23: choroid plexus	Absent
TS23: pituitary gland	Present
TS23: nasal cavity respiratory epithelium	Absent
TS23: olfactory epithelium	Absent
TS23: retina nuclear layer	Absent			Absent in the nuclear and ganglion cell layers.
TS23: inner ear epithelium	Absent			Absent in the sensory and non-sensory epithelium.
TS23: sympathetic ganglion	Absent
TS23: skeletal muscle	Present
TS23: cardiac muscle tissue	Strong
TS23: atrioventricular endocardial cushion	Present
TS23: bulbar cushion	Present
TS23: endocardial cushion	Present
TS23: heart valve	Present
TS23: endocardial tissue	Absent

Structure	Level	Pattern	Image	Note
TS26: cerebral cortex ventricular zone	Strong
TS26: cerebral cortex	Strong
TS26: hippocampus	Strong
TS26: olfactory lobe	Strong
TS26: corpus striatum	Present
TS26: telencephalon	Strong	Regionally restricted		Expression was detected in the claustrum.
TS26: diencephalon	Strong
TS26: midbrain	Strong
TS26: cerebellum	Strong	Regionally restricted		Expression was detected in the cortex and the medulla.
TS26: medulla oblongata	Strong
TS26: pons	Strong
TS26: spinal cord	Strong
TS26: choroid plexus	Absent
TS26: pituitary gland	Strong
TS26: nasal cavity respiratory epithelium	Absent
TS26: olfactory epithelium	Absent
TS26: retina nuclear layer	Present	Regionally restricted		Expression was detected in the ganglion cell layer but was absent from the other nuclear layers.
TS26: inner ear	Present	Regionally restricted		Expression was detected in sensory epithelium but was absent in non-sensory epithelium.
TS26: sympathetic ganglion	Absent
TS26: skeletal muscle	Weak
TS26: cardiac muscle tissue	Strong
TS26: atrioventricular endocardial cushion	Strong
TS26: endocardial cushion	Strong
TS26: heart valve	Strong
TS26: endocardial tissue	Absent