Antibody:	Anti-Beta-catenin
Detection system:	Secondary antibody coupled to fluorescein

Structure	Level	Pattern	Image	Note
TS20: cochlear duct epithelium	Strong	Regionally restricted	1A	Intense expression was detected in the apical surface of the auditory epithelia. There was no difference in expression patterns observed among epithelial regions.

Structure	Level	Pattern	Image	Note
TS21: cochlear duct epithelium	Present	Regionally restricted	1B	Expression was detected in the apical surface of all epithelial cells. In the immature organ of Corti cells expression was only in the apical surface. Expression that overlapped with Ki-67 was found both in the apical and basal portion.

Structure	Level	Pattern	Image	Note
TS23: cochlea epithelium	Present	Regionally restricted	1C	Expression was limited to the apical surface of epithelial cells. Only weak expression was in the basal portion of the auditory epithelium. Weak expression was also noted in the organ of Corti.

Structure	Level	Pattern	Image	Note
TS25: organ of Corti	Strong	Regionally restricted	2A	Expression was strong in the apical portion of the outer hair cells.
TS25: greater epithelial ridge	Strong	Regionally restricted	2A	Expression was strong in the apical portion.
TS25: cochlea epithelium	Weak	Regionally restricted	2A	Weak expression was detected in the apical portion between the outer hair cells and the greater epithelial ridge.

Structure	Level	Pattern	Image	Note
TS28: cochlea	Strong	Regionally restricted	2B	Strong expression was detected in the apical portion of the outer hair cells and greater epithelial ridge, but not inner hair cells. Outer hair cell distribution corresponded to the location of adherens junctions. Expression was in pillar cells.