Probe:	P3H1 cDNA
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

Structure	Level	Pattern	Image	Note
TS19: forelimb bud	Present		3A
TS19: hindlimb bud	Present		3A
TS19: 1st branchial arch	Present		3A	Expression is present in the maxillary and mandibular components of the first embryonic arch.

Structure	Level	Pattern	Image	Note
TS20: tail	Present	Regionally restricted	3D	Expression is present in the distal tip of the tail.
TS20: vibrissa	Present		3D
TS20: forelimb	Present		3D
TS20: hindlimb	Present		3D

Structure	Level	Pattern	Image	Note
TS21: pinna	Present		3G
TS21: forelimb	Present		3G
TS21: hindlimb	Present		3G

Structure	Level	Pattern	Image	Note
TS20: vertebral cartilage condensation	Present	Regionally restricted	4A	Expression is present in prechondrogenic skeletal elements, such as the cartilage condensations in the vertebrae.

Structure	Level	Pattern	Image	Note
TS20: arch of aorta	Strong		4B
TS20: Meckel's cartilage	Present		4B

Structure	Level	Pattern	Image	Note
TS20: cranium	Present		4C	Expression is present in prechondrogenic skeletal elements, such as the cranial primordia. This includes developing cartilage primordia within the eye.
TS20: eye	Absent		4C