Nasal NK cells have a unique expression pattern of Ly49 family receptors.

<p>a, b, c. Flow cytometry of CD3⁻NKp46⁺ cells from nasal passage, spleen, and lung stained with (a) Ly49A, (b) Ly49C/F/H/I, and (c) Ly49D. Numbers in histograms indicate the percentages of positive cells. Continuous lines, specific antibodies; Dashed lines, isotype-matched control antibodies. Dot plots below shows the percentage of positively stained cells. Bar, mean; n.s., not significant; *, <i>P</i> < 0.05; **, <i>P</i> < 0.01 (Mann-Whitney <i>U</i> test with Ryan’s multiple comparison method). Data are obtained from at least 3 independent experiments.