Read e-book online Advances in Insect Physiology, Vol. 25 PDF

By P. D. Evans

ISBN-10: 0120242257

ISBN-13: 9780120242252

Insect body structure is at the moment present process a revolution with the elevated program of molecular organic concepts to enquire the molecular mechanisms underlying the physiological responses to insect cells. Advances in Insect body structure has instituted a dedication to the ebook of top quality studies on molecular biology and molecular genetics in components the place they supply an elevated knowing of physiological techniques in bugs. quantity 25 comprises elevated insurance at the molecular biology of insect body structure.

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Extra resources for Advances in Insect Physiology, Vol. 25

Example text

In order to use this virus gene promoter as an ADVANCES IN INSECT VIROLOGY 25 expression system, it was necessary to insert a copy of the promoter in lieu of the polyhedrin gene promoter (Hill-Perkins and Possee, 1990). Production of bacterial P-galactosidase by the basic protein gene expression vectors was significantly lower than when the polyhedrin gene promoter was used, but initiated from about 8 hpi. This was 6 h before the polyhedrin gene promoter attained a reasonable level of activity.

A tentative sequence of viral replication events was proposed that was similar to that made by Granados and Roberts (1970) and Devauchelle et af. (1971) for ArnEPV. Adoxphyes orana (Ao)EPV has been shown to replicate in a cell line derived from newborn larvae of A . orana fasciata and Hornona magnanirna (Sato, 1989). Most of the studies on EPV replication in vitro have, however, been performed with AmEPV in either the EAA-BTI or LD-652 cell lines. In EAA-BTI cells, AmEPV DNA synthesis can first be detected between 6 and 12 hpi, with a period of rapid DNA synthesis from 12 to 24 hpi (Langridge, 1983a).

Historically, an EPV has been named after the host insect from which it was originally isolated. Like the orthopoxviruses, the EPV virion is brick-shaped or oval with sizes ranging from 150 to 470nm long, and from 165 to 300nm wide. , 1964). , 1971). In cross-section or when the negative stain penetrates the particle, the virion is shown to contain an electrondense core surrounded by a multilayer membrane. EPVs from Orthopteran and Lepidopteran hosts generally contain a cylindrical core and two lateral bodies, while those infecting Dipteran hosts contain a biconcave core and two well-developed lateral bodies.

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Advances in Insect Physiology, Vol. 25 by P. D. Evans

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