NCR1 and allergic asthma: Since activated CD4+ T cells are key players in allergic asthma, we determined the specificity of expression of NKp46, NKG2D, ASGM1, and NK1.1 on NK cells, NK1.1+ natural killer T (NKT) cells, and naïve and memory conventional CD4+ T cells in the lungs of naïve and asthmatic mice (Fig 2A and B).