Probe:	Sek4 cDNA2
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS21: forebrain ventricular layer	Present		4A	With the highest levels in the region closest to the midline.
TS21: forebrain	Present	Regionally restricted	4A	Expressed in the intermediate zone, with the highest levels in the region closest to the midline.
TS21: neocortex	Present	Regionally restricted	4A	Highest expression in cingulate cortex.
TS21: telencephalon	Present	Regionally restricted	4A	Highest expression in the hippocampal anlage.
TS21: diencephalon	Present	Regionally restricted	4A	Highest expression in the ventral aspect of the third ventricle, through which the anterior commissure axons will travel on their way to the contralateral side.

Structure	Level	Pattern	Image	Note
TS24: cerebral cortex subventricular zone	Present		4C	Highest expression.
TS24: cerebral cortex ventricular layer	Present		4C	Highest expression.
TS24: cortical plate	Present		4C	Highest expression.
TS24: cerebral cortex intermediate zone	Absent		4C

Structure	Level	Pattern	Image	Note
TS22: medial habenular nucleus	Strong		6E
TS22: lateral habenular nucleus	Present		6E

Structure	Level	Pattern	Image	Note
TS21: mandible	Present		8E
TS21: maxilla	Present		8E
TS21: tongue	Present		8E
TS21: palatal shelf	Present	Regionally restricted	8E	Expressed in the vertical palatal shelves.
TS21: face mesenchyme	Strong		8E

Structure	Level	Pattern	Image	Note
TS21: face mesenchyme	Absent		8F
TS21: mandible	Absent		8F
TS21: maxilla	Absent		8F
TS21: palatal shelf	Absent		8F
TS21: tongue	Absent		8F