Probe:	Fgf20 probe
Probe preparation:	Antisense labelled with S35 RNA

Structure	Level	Pattern	Image	Note
TS17: oral region epithelium	Present	Regionally restricted	1A	Expression was detected in the thickened oral epithelium at the site of tooth initiation.

Structure	Level	Pattern	Image	Note
TS19: oral region epithelium	Present	Regionally restricted	1B	Expression was detected in the thickened oral epithelium at the site of tooth initiation.

Structure	Level	Pattern	Image	Note
TS20: dental placode	Present	Regionally restricted	1C	Expression was restricted to the signaling center in the tooth placode epithelium.

Structure	Level	Pattern	Image	Note
TS21: enamel knot	Present	Regionally restricted	1D	Expression was detected at the tip of the bud in the forming enamel knot.
TS21: tooth bud	Present	Regionally restricted	1D	Expression was detected at the tip of the bud in the forming enamel knot.

Structure	Level	Pattern	Image	Note
TS22: cap stage tooth	Strong		1E
TS22: primary enamel knot	Strong		1E

Structure	Level	Pattern	Image	Note
TS24: bell stage tooth	Strong		1F
TS24: secondary enamel knot	Strong		1F

Structure	Level	Pattern	Image	Note
TS26: secondary enamel knot	Strong