Figure 4 of Yao, Mol Vis 2015; 21:1113-1121.

Figure 4. Gene expression. The expression of functional correlation genes was tested. The quantitative PCR (qPCR) results show that with the extension of the culture time, the expression of MUC5AC mRNA was not significantly decreased, and CK4 expression exhibits apparent increases in the conjunctival epithelial cell sheets. ** p≤0.01.