1887

Abstract

SUMMARY

The uptake of two forms of multiple nucleocapsid nuclear polyhedrosis virus by cells in culture has been evaluated. Subtle differences in the Mg and Ca requirements for the uptake of cell-released virus (CRV) and polyhedron-derived virus (PDV) exist; otherwise, both forms of the virus appeared similar in their mode of uptake. Entry occurs by fusion of the plasma membrane of the cell with the envelope surrounding the virus nucleocapsid at neutral pH. The receptor turnover for the virus probably occurs rapidly since saturation of receptor sites for the virus was not achieved. The binding and penetration of the virus, and the uncoating and transport of the viral genome to the nucleus is rapid. Uncoating occurs predominantly in the cytoplasm. The lower infectivity of PDV, compared with CRV, for cells in culture may happen because this form of the virus accumulates in cell vacuoles and is unable to proceed with infection.

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1985-03-01
2022-01-28
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