Probe:	Isl1 cDNA
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

Structure	Cell Type	Level	Pattern	Image	Note
TS23: corpus striatum	striatum neuron	Present	Regionally restricted	9K	Expression was detected in the differentiating field.
TS23: lateral ganglionic eminence		Present	Regionally restricted	9K	Expression was detected in the lateral ganglionic eminence subventricular zone.

Structure	Cell Type	Level	Pattern	Image	Note
TS23: corpus striatum	striatum neuron	Weak	Regionally restricted	9L	Expression in the differentiating field was reduced in the double mutant.
TS23: lateral ganglionic eminence		Present	Regionally restricted	9L	Expression in the lateral ganglionic eminence subventricular zone was markedly expanded.

Structure	Cell Type	Level	Pattern	Image	Note
TS21: telencephalon	neuron of the forebrain	Present	Regionally restricted	10E'	Expression was detected in corridor neurons between the Nkx2-1-positive proliferating zone and globus pallidus.

Structure	Cell Type	Level	Pattern	Image	Note
TS21: telencephalon	neuron of the forebrain	Present	Regionally restricted	10F'	Isl1-positive corridor neurons were expanded or dispersed in the miR-9-2/3 double mutants.