Expression of interfollicular epidermal stem cell markers in MHCI negative cells. (A) Differentially expressed genes identified by microarray analysis that were discussed in the text. The numbers shown are in fold change in log2 scale and are the highest score for the gene. (B) The differentially expressed genes identified by microarray analysis and/or known epidermal SC markers were confirmed using semi-quantitative RT-PCR. PCR was run for 25, 30, and 35 cycles. β-catenin mRNA, which did not show significant change of expression in the two cell populations was used as a control.