Probe:	Xbp1 probe1
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS22: cap stage tooth	Present	Regionally restricted	2d
TS22: tooth epithelium	Strong	Regionally restricted	2d	Expression more intense along epithelium than in mesenchyme.
TS22: cervical loop	Strong		2d	Expression more intense along cervical loop region of enamel organ than in the enamel knot.
TS22: primary enamel knot	Present		2d	Expression more intense along cervical loop region of enamel organ than in the enamel knot.

Structure	Level	Pattern	Image	Note
TS24: bell stage tooth	Present	Regionally restricted	3g	Expression more intense in inner enamel epithelium than in dental papilla.
TS24: inner enamel epithelium	Present		3g	Intense expression in inner enamel epithelium cells aligned along basement membrane.

Structure	Level	Pattern	Image	Note
TS27: molar dental papilla	Strong	Regionally restricted	4g	Expression more intense along developing ameloblasts and odontoblasts. More intense exprssion along lingual side relative to buccal side.
TS27: molar enamel organ	Strong	Regionally restricted	4g	Expression more intense along developing ameloblasts and odontoblasts. More intense exprssion along lingual side relative to buccal side.