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Expression of 2B4 TCR α gene in the thymus of 2B4 αβ TCR transgenic and KI TCR/2B4 TCR β mice with a nonpositive selecting (neutral) background. Thymocytes from 2B4 αβ TCR transgenic mice and KI TCR/2B4 TCR β with kxb and bxb MHC backgrounds were stained as described in Fig. 2. Thymocyte subsets distribution in total thymocyte and A2B4-positive thymocytes are shown.
