Figure 6.

(A) Representative dot plots of NKG2A/CD94 and CD107a expression on the surface of NK cells after co-culture with Beas-2B transfected with SP1, SP2, and S proteins or control fluorescent antibody was used as a positive control (null-transfected). (B) The histograms show the mean ± standard deviation percentage of NKG2A/CD94-positive cells in three independent experiments. * significant p values Student t test. (C) Relative ratio of real-time PCR of NKG2A expression in transfected Beas-2B cells. * significant p values Student t test.