Thymus cellularity, TEC subset definition, and peripheral T cells in BMT mice. (A–C ) Total thymus cellularity is shown across all time points analyzed after BMT (A), cTEC/mTEC gating (B), and number of CD4⁺ and CD8⁺ αβT cells in the spleen (C) of age-matched control and BMT mice (donor-derived CD45.1⁺ cells for the latter) at the indicated time points after transplant (minimum of eight mice from at least three separate experiments). d, day. Error bars indicate SEM. *, P < 0.05; **, P < 0.01; ***, P < 0.001; ****, P < 0.0001.