Probe:	Pifo probe1
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS20: palatal shelf	Present	Regionally restricted	1a	Expression is from the anterior to the middle side of the palatal shelves and is absent in the posterior region.

Structure	Level	Pattern	Image	Note
TS20: palatal shelf mesenchyme	Strong	Regionally restricted	1b , 1c	Expression is in the mesenchyme in the underlying mesenchyme just beneath palatal epithelium.
TS20: palatal shelf epithelium	Absent		1c , 1b

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Strong	Regionally restricted	1d	Expression is from the anterior to the middle regions in the vertically shaped palatal shelves and is absent in the posterior region.
TS21: palatal shelf mesenchyme	Strong		1d

Structure	Level	Pattern	Image	Note
TS21: palatal shelf mesenchyme	Strong		1f , 1e	Expression is stronger in the underlying mesenchyme just beneath the epithelium.
TS21: palatal shelf epithelium	Absent		1f , 1e

Structure	Level	Pattern	Image	Note
TS22: nasal cavity epithelium	Strong	Regionally restricted	1g	Expression is in the lateral side of the developing nasal cavity.
TS22: secondary palate	Present		1g	Expression is throughout the anterior to posterior region.
TS22: palatal shelf mesenchyme	Weak	Regionally restricted	1g
TS22: palatal shelf epithelium	Absent		1g	Expression is absent in the oral side epithelium.

Structure	Level	Pattern	Image	Note
TS22: nasal cavity epithelium	Strong	Regionally restricted	1i , 1h	Expression is in the lateral side of the developing nasal cavity.
TS22: palatal shelf mesenchyme	Weak		1i , 1h
TS22: palatal shelf epithelium	Absent		1i , 1h	Expression is absent in the oral side epithelium.