Probe:	Opr(3')
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS17: forebrain	Present	Regionally restricted	4A	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS17: midbrain	Present	Regionally restricted	4A	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS17: diencephalon lamina terminalis	Present		4A
TS17: diencephalon	Present	Regionally restricted	4A	Expression was detected in dorsal midline.
TS17: telencephalon	Present	Regionally restricted	4A	Expression was detected in the cortical hem region, but was not found in the roof of the telencephalon.

Structure	Level	Pattern	Image	Note
TS17: forebrain	Present	Regionally restricted	4B	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS17: midbrain	Present	Regionally restricted	4B	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS17: diencephalon lamina terminalis	Present		4B
TS17: diencephalon	Present	Regionally restricted	4B	Expression was detected in dorsal midline.
TS17: telencephalon	Present	Regionally restricted	4B	Expression was detected in the cortical hem region, but was not found in the roof of the telencephalon.

Structure	Level	Pattern	Image	Note
TS20: forebrain	Present	Regionally restricted	4C	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS20: midbrain	Present	Regionally restricted	4C	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS20: diencephalon lamina terminalis	Present		4C
TS20: diencephalon	Present	Regionally restricted	4C	Expression was detected in dorsal midline.
TS20: cerebral cortex	Present	Regionally restricted	4C	Expression was detected in the cortical hem region. It was greatly reduced in the rostral part but maintained in the caudal aspect.
TS20: telencephalon	Present	Regionally restricted	4C	Expression was detected in the cortical hem region, but was not found in the roof of the telencephalon.

Structure	Level	Pattern	Image	Note
TS20: forebrain	Present	Regionally restricted	4D	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS20: midbrain	Present	Regionally restricted	4D	Expression was detected in dorsomedial parts of forebrain and midbrain.
TS20: diencephalon lamina terminalis	Present		4D
TS20: optic stalk	Present		4D
TS20: diencephalon	Present	Regionally restricted	4D	Expression was detected in dorsal midline.
TS20: cerebral cortex	Present	Regionally restricted	4D	Expression was detected in the cortical hem region. It was greatly reduced in the rostral part but maintained in the caudal aspect.
TS20: telencephalon	Present	Regionally restricted	4D	Expression was detected in the cortical hem region and the amygdala, but was not found in the roof of the telencephalon.

Structure	Level	Pattern	Image	Note
TS20: cerebral cortex	Present	Regionally restricted	4E	Expression was faint in the rostral part of the cortical hem region.
TS20: telencephalon	Present	Regionally restricted	4E	Expression was detected in the cortical hem region and the septum.

Structure	Level	Pattern	Image	Note
TS20: cerebral cortex	Present	Regionally restricted	4F	Expression was maintained in the caudal aspect of the cortical hem region.
TS20: optic stalk	Present		4F
TS20: thalamus	Present	Regionally restricted	4F	Expression was detected in the thalamic eminence.