Antibody:	anti-BP-230 (5E-HY-4B)
Detection system:	Secondary antibody coupled to Cy3

Structure	Level	Pattern	Image	Note
TS21: lower jaw molar epithelium	Present		5A	Expressed in the whole bud, with the epitheliomesenchymal junction was more strongly stained and especially on the lateral aspect.

Structure	Level	Pattern	Image	Note
TS22: outer enamel epithelium	Present		5B	Expression was more pronounced in the lateral part than in the medial part.
TS22: inner enamel epithelium	Absent		5B

Structure	Level	Pattern	Image	Note
TS23: outer enamel epithelium	Present	Regionally restricted	5C	Expression was more pronounced in the lateral part than in the medial part.
TS23: inner enamel epithelium	Absent		5C

Structure	Level	Pattern	Image	Note
TS24: outer enamel epithelium	Present	Regionally restricted	5D	Expression was more pronounced in the lateral part than in the medial part.
TS24: inner enamel epithelium	Present	Regionally restricted	5D	Expressed in a central area.

Structure	Level	Pattern	Image	Note
TS26: outer enamel epithelium	Present	Regionally restricted	5E	Expression disappeared from the basal pole of the outer dental epithelial cells but remained present at the epitheliomesenchymal junction of the gubernaculum dentis.
TS26: inner enamel epithelium	Present	Regionally restricted	5E	Expression was also seen at the epitheliomesenchymal junction at the tip of the cusps.

Structure	Level	Pattern	Image	Note
TS26: outer enamel epithelium	Present	Widespread	5F
TS26: inner enamel epithelium	Present	Widespread	5F	Except for some cells of the inner dental epithelium at the tip of the cusps.

Structure	Level	Pattern	Image	Note
TS26: enamel epithelium	Present	Widespread	6A , 6B
TS26: oral epithelium	Present	Regionally restricted	6B , 6A	Only expressed in the epitheliomesenchymal junctions.
TS26: tongue epithelium	Present	Regionally restricted	6B , 6A	Only expressed in the epitheliomesenchymal junctions.