Probe:	Fgf18 probe13
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS19: palatal shelf	Present	Regionally restricted	1A	Expression in posterior region of palatal primordia. No expression in middle region of palatal shelf.

Structure	Level	Pattern	Image	Note
TS19: mandible primordium	Present		1B
TS19: tongue	Present		1B

Structure	Level	Pattern	Image	Note
TS19: palatal shelf	Present	Regionally restricted	1C	Expression in posterior palatal shelf.
TS19: jaw primordium	Present	Regionally restricted	1C	Expression at maxillomandibular junction region.
TS19: mandible primordium	Present		1C
TS19: tongue	Present		1C

Structure	Level	Pattern	Image	Note
TS19: palatal shelf	Present	Regionally restricted	1D	No expression in middle region of palatal shelf.
TS19: mandible primordium	Present		1D
TS19: tongue	Present		1D

Structure	Level	Pattern	Image	Note
TS19: palatal shelf	Present	Regionally restricted	1E	Much lower level of expression in anterior region of palatal shelf.
TS19: mandible primordium	Present		1E
TS19: tongue	Present		1E

Structure	Level	Pattern	Image	Note
TS20: palatal shelf	Present	Regionally restricted	1F	Expression in posterior palatal shelf. Much lower level of expression in anterior region. No expression in middle region of palatal shelf.
TS20: jaw primordium	Present	Regionally restricted	1F	Expression at maxillomandibular junction region.

Structure	Level	Pattern	Image	Note
TS20: mandible primordium	Present		1G
TS20: tongue	Present		1G

Structure	Level	Pattern	Image	Note
TS20: palatal shelf	Present	Regionally restricted	1H	Expression in posterior palatal shelf.
TS20: jaw primordium	Present	Regionally restricted	1H	Expression at maxillomandibular junction region.
TS20: mandible primordium	Present		1H
TS20: tongue	Present		1H

Structure	Level	Pattern	Image	Note
TS20: palatal shelf	Present	Regionally restricted	1I	Expression in posterior palatal shelf.
TS20: jaw primordium	Present	Regionally restricted	1I	Expression at maxillomandibular junction region.
TS20: mandible primordium	Present		1I
TS20: tongue	Present		1I

Structure	Level	Pattern	Image	Note
TS20: palatal shelf	Present	Regionally restricted	1J	Much lower level of expression in anterior region.
TS20: mandible primordium	Present		1J
TS20: tongue	Present		1J

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Present	Regionally restricted	1K	Expression in posterior palatal shelf. Much lower level of expression in anterior region of palatal shelf. No expression in middle region of palatal shelf.
TS21: jaw bone	Present	Regionally restricted	1K	Expression at maxillomandibular junction region.

Structure	Level	Pattern	Image	Note
TS21: mandible	Present		1L
TS21: tongue	Present		1L

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Present	Regionally restricted	1M	Expression in posterior palatal shelf.
TS21: jaw bone	Present	Regionally restricted	1M	Expression at maxillomandibular junction region.

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Present	Regionally restricted	1N	No expression in middle region of palatal shelf.

Structure	Level	Pattern	Image	Note
TS21: palatal shelf	Present	Regionally restricted	1O	Much lower level of expression in anterior region of palatal shelf.
TS21: mandible	Present		1O
TS21: tongue	Present		1O

Structure	Level	Pattern	Image	Note
TS22: palatal shelf	Weak		1P	Expresiion decreased by E14.5.
TS22: mandible	Present		1P
TS22: tongue	Present		1P

Structure	Level	Pattern	Image	Note
TS22: mandible	Present		1Q
TS22: tongue	Present		1Q

Structure	Level	Pattern	Image	Note
TS22: palatal shelf	Weak	Regionally restricted	1R	Expression in posterior palatal shelf.

Structure	Level	Pattern	Image	Note
TS22: palatal shelf	Present		1S	No expression in middle region of palatal shelf.
TS22: mandible	Present		1S
TS22: tongue	Present		1S

Structure	Level	Pattern	Image	Note
TS22: palatal shelf	Weak	Regionally restricted	1T	Much lower level of expression in anterior region of palatal shelf.
TS22: mandible	Present		1T
TS22: tongue	Present		1T