Probe:	P3H2 cDNA
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

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

Structure	Level	Pattern	Image	Note
TS20: tail	Present	Regionally restricted	3E	Expression is present in the distal tip of the tail.
TS20: vibrissa	Present		3E
TS20: vertebral cartilage condensation	Present		3E	Expression is present in the developing vertebral bodies.
TS20: forelimb	Present		3E
TS20: hindlimb	Present		3E

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

Structure	Level	Pattern	Image	Note
TS20: axial skeleton	Present	Regionally restricted	4D	Expression is observed in cells forming part of the intervertebral discs. There is no expression in precartilaginous structures.

Structure	Level	Pattern	Image	Note
TS20: Meckel's cartilage	Absent		4E
TS20: arch of aorta	Absent		4E

Structure	Level	Pattern	Image	Note
TS20: lens vesicle	Present		4F