Human thymi contain IELp phenotype cells. Human thymi were analyzed for the presence of cells expressing markers that were previously characterized in the murine IELp population. (A and C) Total thymocytes were analyzed for the expression of CD4 and CD8 (left). CD4^−/dullCD8^−/dull thymocytes were analyzed for expression of CD5 and TCRαβ (right). (B and C) CD4^−/dullCD8^−/dullTCRαβ⁺CD5⁺ thymocytes were gated and examined for expression of the indicated markers. Most data were collected from n = 5 patients over five individual experiments. CD103 and β₇ staining was collected from n = 4 patients over four individual experiments. Error bars indicate SEM.