Phenotype of NK1.1⁺ thymocytes from control and ZAP-70^−/− mice.

Thymocytes were stained with PE–anti-NK1.1 or FITC–anti-NK1.1 and various cell surface markers as described in “Materials and methods.” Expressions of NK1.1 (vertical) and other markers (horizontal) on thymocytes are illustrated: expressions of NK1.1 and T-cell surface markers (A), NK surface markers (B), and stem cell markers (C). Results are representative of 6 independent experiments.