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Neutralization assay results. A total of 1,000 PFU of VSV-WT or VSV-Echi9 were incubated with 2-fold serial dilutions of antibody against echistatin peptide (A) or wild-type VSV (B) for 1 h at 37°C before addition to BHK cells. After 30 min, the monolayer was washed twice with PBS and overlaid with methyl cellulose. Plaques were counted 48 h postinfection. Results are expressed as the percentage of plaques relative to that obtained with no antibody.
