Phenotypic characterization of thymocyte development. A: Total numbers of thymocytes in wild-type and transgenic rats during the first 20 weeks of age (note the split axis) (N = 5). B: Representative FACS analyses for CD4, CD8, and TCRβ expression on thymocytes in 10-week-old rats. The relative percentages within the quadrants/gates are indicated. C: Numbers of thymocyte subsets in 10-week-old rats. Depicted is the percentage of the absolute number of a cell population in transgenic rats compared with wild-type controls. γδT, γδTCR+ cells; DN1, CD45RC+CD2− DN cells; DN2, CD45RC+CD2+ DN cells.