Probe:	Msx1 cDNA2
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography
Assay notes:	Probe was shortened by limited alkaline hydrolysis to around 100 bases.

Structure	Level	Pattern	Image	Note
TS18: 1st branchial arch mandibular component mesenchyme	Present		1A	Expression in the mesenchyme of the anterior region of both mandibular and maxillary processes with a decreasing gradient of expression away from the stomadeum. Expression in the mesenchyme adjacent to, and anterior to, an epitheliel thickening.
TS18: 1st branchial arch maxillary component mesenchyme	Present		1A	Expression in the mesenchyme of the anterior region of both mandibular and maxillary processes with a decreasing gradient of expression away from the stomadeum. Expression in the mesenchyme adjacent to, and anterior to, an epitheliel thickening.
TS18: 1st branchial groove	Present	Regionally restricted	1A	Expression in the mesenchyme adjacent to the first branchial cleft.
TS18: 2nd branchial arch	Weak	Regionally restricted	1A	Negligible expression in the anterior region of the second branchial arch.
TS18: 1st branchial arch mandibular component ectoderm	Absent		1A
TS18: 1st branchial arch maxillary component ectoderm	Absent		1A

Structure	Level	Pattern	Image	Note
TS20: mandibular process mesenchyme	Present	Regionally restricted	1C	Expression in the mesenchyme around the epithelial buds.
TS20: maxillary process mesenchyme	Present	Regionally restricted	1C	Expression in the mesenchyme around the epithelial buds.

Structure	Level	Pattern	Image	Note
TS22: lower jaw molar dental papilla	Present		2B	Expression in the dental papilla and dental follicle mesenchyme.
TS22: lower jaw molar dental follicle	Present		2B	Expression in the dental papilla and dental follicle mesenchyme.
TS22: lower jaw molar epithelium	Absent		2B