Probe:	Pax9 probe14
Probe preparation:	Antisense labelled with P33 RNA

Structure	Level	Pattern	Image	Note
TS21: palatal shelf mesenchyme	Present	Regionally restricted	5A	Expression is dynamic, transitioning from the lateral to medial aspects of the palatal shelf. At E13.5 an intermediate pattern is seen.
TS21: jaw mesenchyme	Present	Regionally restricted	5A	Expression was detected in the condensing mesenchyme surrounding the developing molars.

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Present	Regionally restricted	5B	Expression is dynamic, transitioning from the lateral to medial aspects of the palatal shelf. At E13.5 an intermediate pattern is seen as in control embryos.
TS21: jaw mesenchyme	Present	Regionally restricted	5B	Expression was detected in the condensing mesenchyme surrounding the developing molars in a similar pattern to control embryos.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf mesenchyme	Present	Regionally restricted	5C	At E14.5 mutant shelves show the full transition to medial expression in the posterior palate.
TS22: jaw mesenchyme	Present	Regionally restricted	5C	Expression was detected in the condensing mesenchyme surrounding the developing molars in a similar pattern to control embryos.