Probe:	Dlx3 cDNA
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS19: 1st branchial arch	Present	Regionally restricted	5A/B	Expression is in the posterior portion of the arch. The lateral extent of expression ends at the branchial pouch.
TS19: 2nd branchial arch	Present	Regionally restricted	5A/B	Expression is in the posterior portion of the arch. The lateral extent of expression ends at the branchial pouch.

Structure	Level	Pattern	Image	Note
TS20: mandibular process mesenchyme	Present		5C/D	Expression is mainly found in mesenchymal cells.
TS20: head mesenchyme	Present	Regionally restricted	5C/D	Expression is present in the lateral region of the first and second arch. Expression is mainly in mesenchymal cells.

Structure	Level	Pattern	Image	Note
TS21: outer ear	Present		5E/F	Expression is present in the mesenchyme abutting the first branchial cleft; this is the area from which the external ear develops.

Structure	Level	Pattern	Image	Note
TS21: nasal capsule	Present		5G/H
TS21: nasal cavity epithelium	Present	Regionally restricted	5G/H	Expression is present in the respiratory epithelium of the naris; there is no expression in the more internal sensory epithelium.

Structure	Level	Pattern	Image	Note
TS21: middle ear mesenchyme	Weak	Diffuse	5I/J

Structure	Level	Pattern	Image	Note
TS20: inner ear vestibular component	Present		6C

Structure	Level	Pattern	Image	Note
TS21: utricle epithelium	Present		6D/E
TS21: semicircular canal epithelium	Present		6D/E
TS21: saccule	Absent		6D/E

Structure	Level	Pattern	Image	Note
TS21: semicircular canal	Present	Non-Uniform	6H/I
TS21: utricle	Present		6H/I

Structure	Level	Pattern	Image	Note
TS22: upper jaw mesenchyme	Present	Single cells
TS22: semicircular canal	Absent

Structure	Level	Pattern	Image	Note
TS21: lower jaw molar mesenchyme	Strong		7E/F	Expression is present in the mesenchyme of the dental papilla.

Structure	Level	Pattern	Image	Note
TS21: incisor	Present		7I	Areas of expression include the follicular mesenchyme.

Structure	Level	Pattern	Image	Note
TS24: incisor enamel organ	Present	Regionally restricted	7L	Expression is present in the ameloblast layer.
TS24: incisor mesenchyme	Present	Regionally restricted	7L	Expression is present in odontoblasts.

Structure	Level	Pattern	Image	Note
TS21: vibrissa	Present	Graded	8C	The follicles differentiate in an anterior-posterior sequence; the expression levels seen are consistent with that.

Structure	Level	Pattern	Image	Note
TS24: vibrissa	Strong	Regionally restricted	8F/G	Expression is seen in the matrix cells.

Structure	Level	Pattern	Image	Note
TS27: vibrissa	Present	Regionally restricted		Expression is seen in the matrix cells.