Antibody:	anti-Prox1
Detection system:	Secondary antibody coupled to Alexa Fluor 488

Structure	Cell Type	Level	Pattern	Image	Note
TS23: cochlea epithelium	cochlear outer hair cell	Present	Regionally restricted	4A3 , 4A1	Expressed in the precursor cells in the most basal region of the developing cochlea, including in the future outer hair cells, Dieter's cells, and pillar cells.
TS23: cochlea epithelium	Deiter's cell	Present	Regionally restricted	4A3 , 4A1	Expressed in the precursor cells in the most basal region of the developing cochlea, including in the future outer hair cells, Dieter's cells, and pillar cells.
TS23: cochlea epithelium	pillar cell	Present	Regionally restricted	4A3 , 4A1	Expressed in the precursor cells in the most basal region of the developing cochlea, including in the future outer hair cells, Dieter's cells, and pillar cells.

Structure	Cell Type	Level	Pattern	Image	Note
TS24: cochlea epithelium	Deiter's cell	Present	Regionally restricted	4B1 , 4B3	Expressed in the precursor cells in the basal region of the developing cochlea, including in the future Dieter's cells, and pillar cells.
TS24: cochlea epithelium	pillar cell	Present	Regionally restricted	4B1 , 4B3	Expressed in the precursor cells in the basal region of the developing cochlea, including in the future Dieter's cells, and pillar cells.

Structure	Cell Type	Level	Pattern	Image	Note
TS26: cochlea epithelium	supporting cell of cochlea	Strong		4C3 , 4C1	The supporting cells underlying the hair cells expressed high levels, but supporting cells underlying the inner hair cells had no expression.
TS26: cochlea epithelium	border cell of cochlea	Absent		4C1 , 4C3
TS26: cochlea epithelium	Hensen cell	Absent		4C1 , 4C3
TS26: cochlea epithelium	inner phalangeal cell	Absent		4C1 , 4C3

Structure	Cell Type	Level	Pattern	Image	Note
TS26: cochlea epithelium	supporting cell of cochlea	Strong		4C4	The supporting cells underlying the hair cells expressed high levels, but supporting cells underlying the inner hair cells had no expression.
TS26: cochlea epithelium	border cell of cochlea	Absent		4C4
TS26: cochlea epithelium	Hensen cell	Absent		4C4
TS26: cochlea epithelium	inner phalangeal cell	Absent		4C4

Structure	Level	Pattern	Image	Note
TS23: semicircular canal epithelium	Present	Regionally restricted	5A1 , 5A3	Expressed in the crista ampullaris.
TS23: utricle epithelium	Present		5A3 , 5A1

Structure	Level	Pattern	Image	Note
TS24: semicircular canal epithelium	Present	Regionally restricted	5B1 , 5B3	Expressed in the crista ampullaris.
TS24: utricle epithelium	Present		5B1 , 5B3

Structure	Level	Pattern	Image	Note
TS26: saccule epithelium	Present		5C1 , 5C3
TS26: utricle epithelium	Absent		5C1 , 5C3

Structure	Cell Type	Level	Pattern	Image	Note
TS27: cochlea epithelium	Deiter's cell	Present		7A3 , 7A1
TS27: cochlea epithelium	pillar cell	Present		7A3 , 7A1

Structure	Cell Type	Level	Pattern	Image	Note
TS27: cochlea epithelium	Deiter's cell	Present		7A4
TS27: cochlea epithelium	pillar cell	Present		7A4

Structure	Cell Type	Level	Pattern	Image	Note
TS28: cochlea epithelium	Deiter's cell	Present		7B1 , 7B3	Reduced expression.
TS28: cochlea epithelium	pillar cell	Present		7B1 , 7B3	Reduced expression.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: cochlea epithelium	Deiter's cell	Present		7B4	Reduced expression.
TS28: cochlea epithelium	pillar cell	Present		7B4	Reduced expression.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: cochlea epithelium	Deiter's cell	Weak		7C3 , 7C1	Reduced expression.
TS28: cochlea epithelium	pillar cell	Weak		7C3 , 7C1	Reduced expression.

Structure	Cell Type	Level	Pattern	Image	Note
TS28: cochlea epithelium	Deiter's cell	Weak		7C4	Reduced expression. Even more weakly expressed in the basal region.
TS28: cochlea epithelium	pillar cell	Weak		7C4	Reduced expression. Even more weakly expressed in the basal region.

Structure	Level	Pattern	Image	Note
TS21: vestibular component epithelium	Weak
TS21: cochlea	Absent