Abstract
Summary
The pH optima for the neuraminidase activity of several myxoviruses were determined. The same pH optimum was found for Sendai virus grown in either egg or L cell and for NDV which is closely related to the former virus. However, the antibody prepared against the neuraminidase fraction of egg-grown Sendai virus showed an inhibitory effect only on the neuraminidase activity of egg-grown and L cell-grown Sendai virus but not on that of NDV.
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