Reporter:	lacZ
	Direct Detection

Structure	Level	Pattern	Image	Note
TS23: chondrocranium	Present		1B	Expressed in the periosteum of the calvaria.
TS23: brain dura mater	Strong		1B	Expressed in the potently osteogenic dura mater that underlies the calvaria.

Structure	Level	Pattern	Image	Note
TS27: chondrocranium	Present	Regionally restricted	1C	Expressed on both the periosteal and endosteal surfaces, at much reduced levels compared to E15.5. Expression was strongest in suture mesenchyme and adjacent bone fronts of both overlapping and abutting sutures.
TS27: cranial suture	Present	Regionally restricted	1C	Expression was strongest in suture mesenchyme and adjacent bone fronts of both overlapping and abutting sutures.

Structure	Level	Pattern	Image	Note
TS27: chondrocranium	Present	Regionally restricted	1D	Expressed on both the periosteal and endosteal surfaces, at much reduced levels compared to E15.5. Expression was strongest in suture mesenchyme and adjacent bone fronts of both overlapping and abutting sutures.
TS27: cranial suture	Present	Regionally restricted	1D	Expression was strongest in suture mesenchyme and adjacent bone fronts of both overlapping and abutting sutures.

Structure	Level	Pattern	Image	Note
TS28: cranial suture	Weak	Regionally restricted	1E	Faint expression in the sutural mesenchyme.
TS28: bone marrow	Present	Single cells	1E	Expressed in a few cells.