Reporter:	lacZ
	Direct Detection

Structure	Level	Pattern	Image	Note
TS15: 1st branchial arch maxillary component	Present		2A	Expression is present in the forming maxillary process.
TS15: 1st branchial arch mandibular component	Present	Non-Uniform	2A	Expression is present in the forming mandibular process. Expression is highest at the distal end of the process.
TS15: 1st branchial arch	Present	Regionally restricted	2A	Expression is present within cells ventral to the eye that will contribute to the proximal components of the first branchial arch skeleton.

Structure	Level	Pattern	Image	Note
TS15: forelimb bud mesenchyme	Present		2B

Structure	Level	Pattern	Image	Note
TS16: 1st branchial arch maxillary component	Present		2C	Expression is present in the forming maxillary process.
TS16: 1st branchial arch mandibular component	Present		2C	Expression is present in the forming mandibular process.

Structure	Level	Pattern	Image	Note
TS16: 1st branchial arch maxillary component	Present		2D	Expression is present in the forming maxillary process.
TS16: 1st branchial arch mandibular component	Present		2D	Expression is present in the forming mandibular process.
TS16: ear	Present		2D	Expression is present in cells surrounding the first branchial groove that will give rise to ear structures, such as the external acoustic meatus and external ear structures.

Structure	Level	Pattern	Image	Note
TS19: mandibular process	Strong		2E
TS19: maxillary process	Strong		2E
TS19: fronto-nasal process	Present		2E

Structure	Level	Pattern	Image	Note
TS20: mandibular process	Present		2F
TS20: maxillary process	Present		2F
TS20: outer ear	Present		2F
TS20: cranium	Present		2F	Expression is present in cells that prefigure the dermal bones at the lateral aspect of the head, such as the squamosal and other first arch derivatives.

Structure	Level	Pattern	Image	Note
TS17: 1st branchial arch	Present

Structure	Level	Pattern	Image	Note
TS17: 1st branchial arch	Present			Expression in the mutant is similar to that seen in wild type.

Structure	Level	Pattern	Image	Note
TS19: skeleton	Present	Regionally restricted	3A	Expression is present in cells fated to give rise to the dermal bones of the lateral skull.
TS19: mandibular process	Present		3A
TS19: maxillary process	Present		3A

Structure	Level	Pattern	Image	Note
TS19: skeleton	Present	Regionally restricted	3B	As in wild type, expression is present in cells fated to give rise to the dermal bones of the lateral skull.
TS19: mandibular process	Present		3B
TS19: maxillary process	Present		3B

Structure	Level	Pattern	Image	Note
TS20: cranium	Present		3C	Expression is present in cells that are forming membrane bones.
TS20: mandibular process	Present		3C
TS20: maxillary process	Present		3C

Structure	Level	Pattern	Image	Note
TS20: cranium	Absent		3D	In the mutant, expression is lost from cells that will form the lateral skull bones, such as the squamosal and other first arch derivatives.
TS20: mandibular process	Present		3D
TS20: maxillary process	Present		3D