Antibody:	Anti-Foxk1 (ab84759)
Detection system:	Secondary antibody coupled to Alexa Fluor 488

Structure	Level	Pattern	Image	Note
TS23: retina nuclear layer	Present	Regionally restricted	3A	Expression was detected in inner neuroblastic cells.

Structure	Level	Pattern	Image	Note
TS25: retina nuclear layer	Present	Regionally restricted	3B	Expression was detected in inner neuroblastic cells.

Structure	Level	Pattern	Image	Note
TS27: retina inner nuclear layer	Present		3C	As retina development proceeds, expression gradually extends towards the cells in the inner nuclear layer.
TS27: retina ganglion cell layer	Present		3C

Structure	Level	Pattern	Image	Note
TS28: retina ganglion cell layer	Present		3D
TS28: retina inner nuclear layer	Present		3D

Structure	Level	Pattern	Image	Note
TS28: retina ganglion cell layer	Present		3E
TS28: retina inner nuclear layer	Present		3E

Structure	Level	Pattern	Image	Note
TS28: retina ganglion cell layer	Present		3F
TS28: retina inner nuclear layer	Present		3F

Structure	Level	Pattern	Image	Note
TS28: retina inner nuclear layer	Present	Regionally restricted	4C , 4B	Expression co-localized with calretinin-positive amacrine cells.
TS28: retina ganglion cell layer	Present	Regionally restricted	4C , 4B	Expression co-localized with calretinin-positive displaced amacrine or ganglion cells.

Structure	Level	Pattern	Image	Note
TS28: retina inner nuclear layer	Present		4F , 4E
TS28: retina ganglion cell layer	Present	Regionally restricted	4E , 4F	Expression co-localized with Brn3b-positive ganglion cells.

Structure	Level	Pattern	Image	Note
TS28: retina ganglion cell layer	Present	Regionally restricted	4L , 4K	Expression co-localized with calbindin-positive ganglion cells.
TS28: retina inner nuclear layer	Present	Regionally restricted	4K , 4L	Expression co-localized with calbindin-positive amacrine cells in the innermost part of the inner nuclear layer. Calbindin-positive horizontal cells in the outermost part of the inner nuclear layer were not labeled.