(A) The NP moiety of AU-NP-S-FLAG and AU-R-NP-S-FLAG was replaced with the amino-terminal portion of influenza acid polymerase (PA) to generate AU-PA-S-FLAG or AU-R-PA-S-FLAG. (B) BMA3 cells were infected with Listeria expressing AU-PA-S-FLAG or AU-R-PA-S-FLAG in the presence or absence of 5 µM expoxomicin. At 3 h post-infection, cells were lysed and immunoblotted for FLAG and β-actin. FLAG staining was normalized to β-actin for three independent experiments. Data are shown as mean ± SEM, *,p<0.05. (C) BMA3 cells, (D) BMMΦ, and (E) BMDC were infected with Listeria expressing AU-PA-S-FLAG or AU-R-PA-S-FLAG and surface Kb-SIINFEKL levels were measured at 20 min intervals from 80 to 300 min post-infection. Graphs are representative of 3 independent experiments.