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The host cellular protein A5 is upregulated at the cell surface after IAV infection. A549 (A) or MDCK (B) cells were either left uninfected or infected with A/PR/8/34, A/Udorn/72, or A/WSN/33 viruses (MOI of 10). At 24 hpi, flow cytometry analysis was performed with an anti-A5 antibody (closed histograms) or an isotype control (open histograms). The viral protein M2 was used as a positive control for viral infection. The results are representative of two independent experiments.
