Probe:	Sox9 cDNA3
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS21: molar epithelium	Present		2A
TS21: incisor mesenchyme	Weak		2A
TS21: molar mesenchyme	Weak		2A
TS21: oral epithelium	Weak		2A

Structure	Level	Pattern	Image	Note
TS24: molar epithelium	Strong	Regionally restricted	2B	Expression is in epithelial derivatives.
TS24: inner enamel epithelium	Present	Regionally restricted	2B	Expression is in the inner enamel epithelium at the labial side and are absent in cells at the lingual side.
TS24: molar dental papilla	Weak		2B

Structure	Cell Type	Level	Pattern	Image	Note
TS26: 1st molar	preameloblast	Present		2C	Expression is in the differentiating preameloblasts of the first molar.
TS26: enamel organ	preameloblast	Present		2C	Expression is in the differentiating preameloblasts of the first molar.
TS26: stratum intermedium		Present		2C	In the first molar.
TS26: molar dental papilla		Present	Regionally restricted	2C	Expression is in cells of the sub-odontoblastic layer and are absent in odontoblasts.
TS26: outer enamel epithelium		Absent		2C
TS26: stellate reticulum		Absent		2C
TS26: molar dental papilla	odontoblast	Absent		2C	Absent in odontoblasts.

Structure	Cell Type	Level	Pattern	Image	Note
TS26: 1st molar	preameloblast	Present		2D	Expression is in the differentiating preameloblasts of the first molar.
TS26: enamel organ	preameloblast	Present		2D	Expression is in the differentiating preameloblasts of the first molar.
TS26: stratum intermedium		Present		2D	In the first molar.
TS26: molar dental papilla		Present	Regionally restricted	2D	Expression is in cells of the sub-odontoblastic layer and are absent in odontoblasts.
TS26: outer enamel epithelium		Absent		2D
TS26: stellate reticulum		Absent		2D
TS26: molar dental papilla	odontoblast	Absent		2D	Absent in odontoblasts.