Probe:	neuregulin type I
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS16: future spinal cord	Present	Regionally restricted	4D	Expression in a well-defined stripe the dorsal column of the spinal cord.

Structure	Level	Pattern	Image	Note
TS20: spinal cord	Absent		4E

Structure	Level	Pattern	Image	Note
TS26: dorsal root ganglion	Present	Single cells	4F	Expression in scattered neurons in dorsal root ganglia.

Structure	Level	Pattern	Image	Note
TS26: superior colliculus	Present		7B
TS26: telencephalon ventricular layer	Present		7B

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

Structure	Level	Pattern	Image	Note
TS23: telencephalon ventricular layer	Present
TS23: cerebral cortex	Absent
TS23: corpus striatum	Absent
TS23: diencephalon	Present
TS23: midbrain	Present
TS23: medulla oblongata	Absent
TS23: pons	Absent
TS23: spinal cord	Present
TS23: choroid plexus	Absent
TS23: pituitary gland	Absent
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	Absent
TS23: cardiac muscle tissue	Absent
TS23: atrioventricular endocardial cushion	Absent
TS23: bulbar cushion	Absent
TS23: endocardial cushion	Absent
TS23: heart valve	Absent
TS23: endocardial tissue	Present
TS23: yolk sac	Present	Regionally restricted		Expression was detected in endothelia.
TS23: embryo	Present

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