Probe:	Erbal3 cDNA2
Probe preparation:	Antisense labelled with digoxigenin RNA

Structure	Level	Pattern	Image	Note
TS14: otic placode epithelium	Present	Regionally restricted	1A	Earliest expression at E8.75 (17 somites) in ventral-anterior domain of otic placode epithelium.
TS14: 1st branchial arch	Present		1A
TS14: 2nd branchial arch	Present		1A

Structure	Level	Pattern	Image	Note
TS15: otocyst	Present	Regionally restricted	1B	Authors state expression in otic vesicle expanded posteriorly.
TS15: 1st branchial arch	Present		1B
TS15: 2nd branchial arch	Present		1B

Structure	Level	Pattern	Image	Note
TS15: otocyst	Strong	Regionally restricted	1C	In 26 somite embryos, strong expression in ventral-posterior domain of otic vesicle.

Structure	Level	Pattern	Image	Note
TS15: otocyst epithelium	Present	Regionally restricted	1D	Expression in the posterior quadrant with higher levels at the lateral epithelium.

Structure	Level	Pattern	Image	Note
TS21: cochlear duct epithelium	Present	Widespread		Between E10 and E13.5, expression throughout multi-layered sensory epithelium of elongating cochlear duct from base to apex.

Structure	Level	Pattern	Image	Note
TS23: greater epithelial ridge	Present	Regionally restricted	2A	Between E14.5 and E15.5, expression becomes more confined to greater epithelial ridge of sensory epithelium in apical coil.

Structure	Level	Pattern	Image	Note
TS23: greater epithelial ridge	Strong		2B
TS23: lesser epithelial ridge	Ambiguous		2B	Clear demarcation at border with lesser epithelium ridge at the apical coil.
TS23: cochlear duct epithelium	Present	Regionally restricted	2B	Expression also in medial wall opposing the sensory epithelium.

Structure	Level	Pattern	Image	Note
TS23: cochlear duct epithelium	Present	Regionally restricted	2C	As sensory epithelium develops along length of cochlear duct, relative expression levels decreases.
TS23: greater epithelial ridge	Present		2C	Expression domain extends beyond greater epitheial ridge to lesser epithelial ridge.
TS23: lesser epithelial ridge	Present		2C	Expression domain extends beyond greater epitheial ridge to lesser epithelial ridge.

Structure	Level	Pattern	Image	Note
TS23: cochlear duct epithelium	Weak	Regionally restricted	2D	As development proceeds in apical to basal direction, relative expression level decreases in sensory epithelium.
TS23: greater epithelial ridge	Present		2D	Expression domain extends beyond greater epitheial ridge to lesser epithelial ridge.
TS23: lesser epithelial ridge	Present		2D	Expression domain extends beyond greater epitheial ridge to lesser epithelial ridge.

Structure	Level	Pattern	Image	Note
TS23: cochlea	Absent		2E