Probe:	Olig1 probe1
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

Structure	Level	Pattern	Image	Note
TS15: future spinal cord	Present	Regionally restricted		Expression in the ventral spinal cord.

Structure	Level	Pattern	Image	Note
TS17: future spinal cord	Absent			Authors state that expression has declined to undetectable levels.

Structure	Level	Pattern	Image	Note
TS19: future spinal cord	Absent		2C

Structure	Level	Pattern	Image	Note
TS20: spinal cord ventricular layer	Present	Regionally restricted	2G	Expression in a narrow region of the ventricular zone.

Structure	Level	Pattern	Image	Note
TS21: spinal cord	Present	Regionally restricted	2K	Individual expressing cells detected in the gray matter.

Structure	Level	Pattern	Image	Note
TS22: spinal cord	Present	Regionally restricted	2O	Expressing cells have begun to disperse through gray matter, in a ventral-to-dorsal manner similar to that of Pdgfra-expressing cells.
TS22: spinal cord ventricular layer	Present		2O	Some expressing cells remain in the ventricular zone.

Structure	Level	Pattern	Image	Note
TS23: spinal cord	Present	Regionally restricted	2S	Expression in scattered cells throughout the spinal cord.
TS23: spinal cord ventricular layer	Absent		2S	No expression in the ventricular zone.

Structure	Level	Pattern	Image	Note
TS21: medulla oblongata ventricular layer	Present	Regionally restricted	5A	Foci of expression in the ventricular zone. Foci of expression in the ventricular zone.

Structure	Level	Pattern	Image	Note
TS21: pons ventricular layer	Present	Regionally restricted	5C	Foci of expression in the ventricular zone.

Structure	Level	Pattern	Image	Note
TS21: thalamus ventricular layer	Present	Regionally restricted	5E	Foci of expression in the ventricular zone.

Structure	Level	Pattern	Image	Note
TS22: medulla oblongata ventricular layer	Present		5G	Expression in the ventricular zone.
TS22: medulla oblongata	Present	Regionally restricted	5G	Expressing cells have begun to disperse through the gray matter.

Structure	Level	Pattern	Image	Note
TS22: pons ventricular layer	Present		5I	Expression in the ventricular zone.
TS22: pons	Present	Regionally restricted	5I	Expressing cells have begun to disperse through the gray matter.

Structure	Level	Pattern	Image	Note
TS22: thalamus ventricular layer	Present		5K	Expression in the ventricular zone.
TS22: thalamus	Present	Regionally restricted	5K	Expressing cells have begun to disperse through the gray matter.