Probe:	p3.6
Probe preparation:	Antisense labelled with S35 RNA

Structure	Level	Pattern	Image	Note
TS19: oral epithelium	Absent

Structure	Level	Pattern	Image	Note
TS20: oral epithelium	Absent

Structure	Level	Pattern	Image	Note
TS21: lower jaw molar mesenchyme	Weak	Regionally restricted	1A/B	Expression is in a few cell layers of condensing mesenchyme under the lower bud.
TS21: tooth bud	Weak	Regionally restricted	1A/B

Structure	Level	Pattern	Image	Note
TS22: lower jaw molar epithelium	Present	Regionally restricted	1C/D	Expression is in a restricted area in the projection of dental epithelium.
TS22: lower jaw molar mesenchyme	Strong		1C/D
TS22: cap stage tooth	Strong	Regionally restricted	1C/D

Structure	Level	Pattern	Image	Note
TS23: lower jaw molar mesenchyme	Present	Regionally restricted	2A	Expression is around the bud of the second molar.
TS23: mandible	Present	Regionally restricted	2A	Expression is in cells around Meckel's cartilage, as well as in differentiating bone cells.

Structure	Level	Pattern	Image	Note
TS23: lower jaw molar dental papilla	Strong		2B/C

Structure	Level	Pattern	Image	Note
TS24: lower jaw molar dental papilla	Strong	Regionally restricted	2D/E	Adjacent to the inner enamel epithelium.
TS24: lower jaw molar epithelium	Present		2D/E
TS24: outer enamel epithelium	Present		2D/E
TS24: stellate reticulum	Present		2D/E

Structure	Level	Pattern	Image	Note
TS23: lower jaw molar dental papilla	Very strong	Non-Uniform	3A/B	The second molar, dental follicle.
TS23: lower jaw molar mesenchyme	Very strong	Non-Uniform	3A/B	The second molar, dental follicle.
TS23: stellate reticulum	Very strong	Regionally restricted	3A/B	Expression is in the stellate reticulum of the second molar.

Structure	Level	Pattern	Image	Note
TS24: lower jaw molar mesenchyme	Strong	Regionally restricted	3C/D	Expression is in mesenchyme surrounding the tooth germs.
TS24: lower jaw molar dental follicle	Strong		3C/D
TS24: mandible	Strong		3C/D
TS24: inner enamel epithelium	Present	Regionally restricted	3C/D	Expression is in restricted areas.
TS24: outer enamel epithelium	Present	Regionally restricted	3C/D	Expression is in restricted areas.
TS24: stellate reticulum	Present		3C/D

Structure	Level	Pattern	Image	Note
TS26: lower jaw molar dental papilla	Weak	Regionally restricted	4A/B	In the first molar cells of the dental papilla are negative in the mesial cusp and slightly labelled in the distal cusp. In the second molar there is strong expression in the mesial cusp and in a restricted area in the distal cusp.
TS26: lower jaw molar mesenchyme	Present	Regionally restricted	4A/B	Expression is in restricted sites of dental follicle and surrounding mesenchyme.

Structure	Level	Pattern	Image	Note
TS27: lower jaw molar	Present	Regionally restricted	4C/D	Expression is intense in first molar odontoblasts in a restricted area in the mesial cusp.
TS27: enamel organ	Present	Regionally restricted	4C/D	Ameloblasts are heavily labelled in the distal slopes of mesial and distal cusps of the first molar.

Structure	Level	Pattern	Image	Note
TS28: lower jaw molar	Absent			Absent in odontoblasts.