Probe:	Msx1 cDNA15
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS19: latero-nasal process	Present		3A
TS19: mandibular process	Present		3A
TS19: maxillary process	Present		3A
TS19: 2nd branchial arch	Present		3A
TS19: inner ear	Present		3A	Expression is present in the otic capsule.

Structure	Level	Pattern	Image	Note
TS19: latero-nasal process	Present		3B
TS19: maxillary process	Present		3B
TS19: mandibular process	Present	Regionally restricted	3B	Expression is present in the fusing portions.
TS19: frontal process	Absent		3B	There is no expression at the midline.

Structure	Level	Pattern	Image	Note
TS19: head	Present	Regionally restricted	3C	Expression is present is mesenchyme at the midline of the midbrain/cranial vault.

Structure	Level	Pattern	Image	Note
TS20: mandibular process	Present	Regionally restricted	3D	Expression is present at the growing edges.
TS20: maxillary process	Present	Regionally restricted	3D	Expression is present at the growing edges.

Structure	Level	Pattern	Image	Note
TS20: latero-nasal process	Present		3E
TS20: maxillary process	Present	Regionally restricted	3E	Expression is present at the growing edges.
TS20: frontal process	Absent		3E	There is no expression at the midline.

Structure	Level	Pattern	Image	Note
TS23: lower jaw epithelium	Present		3F	Expression is present in the epithelium of the mandibular prominence.
TS23: upper jaw epithelium	Present		3F	Expression is present in the epithelium of the maxillary prominence.
TS23: vibrissa	Present		3F