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A temperature-sensitive mutant of Sendai virus, ts271, when grown at restrictive temperature is known to produce virions lacking integral haemagglutinin-neuraminidase (HN). In this study, it is shown that the transmembrane-cytoplasmic tail of HN is not detected either. This apparent complete lack of HN does not affect budding efficiency.
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Stricker et al. (1991) studied this question.
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