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Effect of NO on Ad5–DsRed infection of epithelial cells. (a) BEC cells were treated with escalating doses of DETA-NO for 8 h before mixing with Ad5–DsRed. (b) BEC cells were treated with increasing concentrations of L-NAME for 8 h before mixing with Ad5–DsRed. In both cases, virus internalization was analysed 36 h after infection. Experiments were repeated three times and data are expressed as mean±sem. *, P<0.05 and **, P<0.01 versus non-treated (NT) samples.
