Table 3. Immunohistochemical patterns between the normal cornea and the RK case with the markers of corneal epithelial stem/progenitor cells and corneal-type epithelial differentiation.

	Normal limbal stem cells	Normal central corneal epithelial cells	Continuously unstable corneal curvatures (central cornea)
Krt3	Negative	Positive	Positive
Cx43	Negative	Positive	Positive
ΔNp63	Positive	Negative	Positive
ABCG2	Positive	Negative	Positive(+++)
p38 MAPK	Negative	Negative	Positive(+++)
AP2	Negative	Negative	Positive
ERK	Positive (+)	Positive (+)	Positive (+++)