Probe:	Sparc cDNA4
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS21: forelimb pre-cartilage condensation	Present	Regionally restricted		Initially localized in a densely packed layer of cells around the outer surface of the cartilage shaft, in a region corresponding to the periosteum.

Structure	Level	Pattern	Image	Note
TS22: humerus cartilage condensation	Present	Regionally restricted	3h/i	Expression confined to cells in the outer periosteal layer.

Structure	Level	Pattern	Image	Note
TS23: forelimb mesenchyme	Strong	Regionally restricted	3k	High levels of expression in the outer periosteal layer, hypertrophic cartilage, and tendons.

Structure	Level	Pattern	Image	Note
TS23: forelimb mesenchyme	Present	Regionally restricted	3m	Expression in hypertrophic cartilage and cells in the outer periosteal layer.

Structure	Level	Pattern	Image	Note
TS25: alveolar sulcus	Present	Regionally restricted	3o	Expression in alveolar bone in the jaw in both periosteum and in cells on the surface of the internal bone trabeculae (endosteum).