Antibody:	anti-Sost
Detection system:	Biotinylated secondary antibody/[Strept]avidin coupled to horseradish peroxidase

Structure	Level	Pattern	Image	Note
TS21: upper jaw incisor	Absent		1A

Structure	Level	Pattern	Image	Note
TS21: lower jaw incisor	Absent		1B

Structure	Level	Pattern	Image	Note
TS21: upper jaw molar	Absent		1C

Structure	Level	Pattern	Image	Note
TS21: lower jaw molar	Absent		1D

Structure	Level	Pattern	Image	Note
TS22: upper jaw incisor	Absent		1E

Structure	Level	Pattern	Image	Note
TS22: lower jaw incisor	Absent		1F

Structure	Level	Pattern	Image	Note
TS22: upper jaw molar	Absent		1G

Structure	Level	Pattern	Image	Note
TS22: lower jaw molar	Absent		1H
TS22: lower jaw skeleton	Present	Regionally restricted	1H	Expression in osteocytes of the newly formed jaw bone.

Structure	Level	Pattern	Image	Note
TS24: upper jaw incisor	Present	Regionally restricted	2A , 2B	Expression in the pre-dentin-secreting odontoblasts.

Structure	Level	Pattern	Image	Note
TS24: upper jaw molar	Absent		2C

Structure	Level	Pattern	Image	Note
TS24: lower jaw incisor	Present	Regionally restricted	2E , 2D	Expression in the pre-dentin-secreting odontoblasts.
TS24: lower jaw skeleton	Present	Regionally restricted	2D	Expression in some osteocytes of the newly formed jaw bone.

Structure	Level	Pattern	Image	Note
TS24: lower jaw molar	Absent		2F
TS24: lower jaw skeleton	Present	Regionally restricted	2F	Expression in some osteocytes of the newly formed jaw bone.

Structure	Level	Pattern	Image	Note
TS26: upper jaw incisor	Present	Regionally restricted	3A , 3B	Expression in the predentin-secreting odontoblasts.
TS26: upper jaw skeleton	Present	Regionally restricted	3A	Expression in the osteocytes of the jaw bone.

Structure	Level	Pattern	Image	Note
TS26: upper jaw molar	Absent		3C
TS26: upper jaw skeleton	Present	Regionally restricted	3C	Expression in the osteocytes of the jaw bone.

Structure	Level	Pattern	Image	Note
TS26: lower jaw incisor	Present	Regionally restricted	3D , 3E	Expression in the predentin-secreting odontoblasts.
TS26: lower jaw skeleton	Present	Regionally restricted	3D	Expression in the osteocytes of the jaw bone.

Structure	Level	Pattern	Image	Note
TS26: lower jaw skeleton	Present	Regionally restricted	3F	Expression in the osteocytes of the jaw bone.
TS26: lower jaw molar	Absent		3F

Structure	Level	Pattern	Image	Note
TS27: upper jaw incisor	Present	Regionally restricted	4B , 4A	Expression in dentin matrix-secreting odontoblasts.
TS27: upper jaw	Present	Regionally restricted	4B , 4A	Expression in the osteocytes of the jaw bone.

Structure	Level	Pattern	Image	Note
TS27: lower jaw incisor	Present	Regionally restricted	4C , 4D	Expression in dentin matrix-secreting odontoblasts.
TS27: mandible	Present	Regionally restricted	4C	Expression in the osteocytes of the jaw bone.

Structure	Level	Pattern	Image	Note
TS27: lower jaw molar	Present	Regionally restricted	4F , 4E	Expression in pre-dentin-secreting odontoblasts.

Structure	Level	Pattern	Image	Note
TS28: lower jaw incisor	Present	Regionally restricted	5A , 5B , 5C	Expression in pre-dentin-secreting odontoblasts.
TS28: mandible	Present	Regionally restricted	5A	Expression in the osteocytes of the jaw bone.