Observations on the polyhedra and virions of the cabbage looper nuclear polyhedrosis virus, with special reference to the viral membranes
- 1 February 1971
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Microbiology
- Vol. 17 (2) , 263-267
- https://doi.org/10.1139/m71-044
Abstract
Polyhedra of the cabbage looper nuclear polyhedrosis virus dried down on a grid are essentially iso-diametric with a mean diameter of 1.05 microns. Profiles of polyhedra in infected tissue sections have a maximum diameter of 1.5 microns. Dimensions of the virions vary according to the location of the virions, from a minimum of 305 millimicrons in length and 51 millimicrons in width when within polyhedra to a maximum of 358 millimicrons in length and 87 millimicrons in width when free in infected fat body nuclei. Both viral membranes present a helical substructure when analyzed photographically. The helical pattern of the outer membrane has a pitch of 28.3° and an interval between successive turns of 56 Angstroms; the pattern on the inner membrane has a pitch of 45.3° and an interval of 107 Angstroms.Keywords
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