Probe:	P3H3 cDNA
Probe preparation:	Antisense labelled with digoxigenin RNA
Visualized with:	Alkaline phosphatase

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

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

Structure	Level	Pattern	Image	Note
TS21: pinna	Present		3I
TS21: tail	Present	Regionally restricted	3I	Expression is present in the distal tip.
TS21: integumental system	Present	Regionally restricted	3I	Expression is present in the hair follicles of the skin.
TS21: forelimb	Present		3I
TS21: hindlimb	Present		3I
TS21: vibrissa	Present		3I

Structure	Level	Pattern	Image	Note
TS20: vertebral cartilage condensation	Present		4G	Expression is present throughout the vertebral bodies.

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

Structure	Level	Pattern	Image	Note
TS20: lens vesicle	Present	Regionally restricted	4I	Expression is present in subpopulations of cells within the lens.
TS20: cornea	Present		4I
TS20: retina	Present		4I