Probe:	Tgfb1 probe2
Probe preparation:	Antisense labelled with S35 RNA
Visualized with:	Autoradiography

Structure	Level	Pattern	Image	Note
TS19: palatal shelf	Absent

Structure	Level	Pattern	Image	Note
TS20: palatal shelf	Absent

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Absent		1C	Palatal shelves show no specific hybridization; no hybridization in epithelial cells within hyperplastic nodules in medial edge epithelia.
TS21: submandibular gland primordium	Strong		1C	Strong hybridisation to the submandibular gland.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf epithelium	Present	Regionally restricted	2B , 2A	Expression in medial edge epithelium.
TS22: maxilla	Present	Regionally restricted	2B , 2A	Expression in regions of membranous ossification within the developing maxilla.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf epithelium	Present	Regionally restricted	2D , 2C	Expression in medial edge epithelium.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf epithelium	Present	Regionally restricted	3B	Medial edge epithelia fuse to form the epithelial seam; faint hybridization localised to epithelial cells of the seam.

Structure	Level	Pattern	Image	Note
TS23: nose	Present	Regionally restricted	4B	Expression is limited to areas of ossification within the palate and around the nasal processes.
TS23: palatal shelf mesenchyme	Present	Regionally restricted	4B	Expression is limited to areas of ossification within the palate and around the nasal processes.