Table 2.

Summary of xCT localisation in ocular tissues.

	Species	Tissue	Localisation	Reference
Immunohistochemistry	Mouse	Cornea	Epi∗	[35]
		Lens	Epi, OC∗
		Embryonic lens	Epi, OC, IC, Core
		Retina	No specific labelling∗
			All layers	[42, 16]
	Rat	Cornea	Epi	[38, 45]
		Lens	Epi, OC, IC, Core	[40]
		Retina	IPL, OPL, Müller cells	[34, 49, 15]
	Human	Cornea	Epi	[37]
		Lens	Young donor: Epi, OC, IC, core	[41]
			Old donor: OC, IC
		Retina	RGC	[16]
	Canine	Lens	Epi, OC	[10]

^∗Labelling specificity verified using an xCT KO mouse. Epi: epithelium; OC: outer cortex; IC: inner cortex; IPL: inner plexiform layer; OPL: outer plexiform layer; RGC: retinal ganglion cells.