Probe:	Irf6 cDNA2
Probe preparation:	Antisense labelled with P33 RNA

Structure	Level	Pattern	Image	Note
TS17: 1st branchial arch maxillary component ectoderm	Present		1I

Structure	Level	Pattern	Image	Note
TS18: latero-nasal process ectoderm	Present		1J	Expression is detected in the epithelial fusion zone between the medial and lateral nasal processes.
TS18: medial-nasal process ectoderm	Present		1J	Expression is detected in the epithelial fusion zone between the medial and lateral nasal processes.

Structure	Level	Pattern	Image	Note
TS19: maxilla primordium	Present	Regionally restricted	1K	Expression is present in the epithelium of the intermaxillary segment.
TS19: naso-lacrimal groove	Strong		1K
TS19: surface ectoderm	Strong	Regionally restricted	1K	Expression is present in the ectoderm surrounding the developing eyes.
TS19: medial-nasal process ectoderm	Present		1K

Structure	Level	Pattern	Image	Note
TS21: naris	Present		1L
TS21: vibrissa follicle	Present		1L

Structure	Level	Pattern	Image	Note
TS21: palatal shelf epithelium	Present	Regionally restricted	2D	Expression is present in the tip of the palatal shelf extending along the presumptive nasal palatal epithelium but is absent from the presumptive oral palatal epithelium.
TS21: enamel knot	Present		2D	Expression is strongest in the enamel knot and enamel organ close to the cervical loop.
TS21: enamel organ	Present		2D	Expression is strongest in the enamel knot and enamel organ close to the cervical loop.
TS21: upper jaw incisor epithelium	Present		2D	Expression is strongest in the enamel knot and enamel organ close to the cervical loop.
TS21: upper jaw molar epithelium	Present		2D	Expression is strongest in the enamel knot and enamel organ close to the cervical loop.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf epithelium	Present	Regionally restricted	2E	Expression is present in the medial edge during palatal fusion. It is also present in the epithelia at the junction of the primary and secondary palate.
TS22: nasal septum epithelium	Present	Regionally restricted	2E	Expression is present in the epithelium along the base.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf epithelium	Strong	Regionally restricted	2F	Expression is present in the medial edge epithelial seam, as well as in the nasal and orgal palatal epithelia as the seam degenerates.
TS22: upper jaw incisor enamel organ	Present		2F	Expression is strongest in the enamel knot and enamel organ close to the cervical loop.
TS22: upper jaw molar enamel organ	Present		2F	Expression is strongest in the enamel knot and enamel organ close to the cervical loop.
TS22: enamel knot	Present		2F