Figure 1. mRNA expression of kynurenine aminotransferases in the cornea, conjunctiva, and retina. Expression of (A) KAT I (the KYAT1 gene), (B) KAT II (the AADAT/KYAT2 gene), (C) KAT III (the KYAT3 gene), and (D) KAT IV (the GOT2 gene) in the cornea (n = 10), conjunctiva (n = 27), and retina (n = 17). Previously described [44-46] microarray data were obtained from the Gene Expression Omnibus (GEO) database (accession numbers: GSE29402, GSE38190, GSE28133, and GSE20436) using Genevestigator software. The Kruskal–Wallis test and Dunn’s post hoc test were used to statistically evaluate the differences in gene expression between the tissues of interest. *** p<0.001; n/s., not significant.