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The Lipid Content of Two Iridescent Viruses

Department of Biological Sciences University of Warwick Coventry, CV4 7AL, U.K.

Lipids extracted from extensively purified iridescent viruses (types 2 and 6) have been analysed by thin-layer chromatography. The lipid forms 9% by weight of the iridescent virus particle and is equivalent to 59 x 10⁶ daltons per particle. Negatively stained preparations and thin sections of the virus particles viewed with the electron microscope indicated that a membrane is located internally. There is sufficient lipid in the virus particles to form a continuous lipid bilayer at this internal site.

^* Present address: Department of Biochemistry, School of Medicine, University of British Columbia, Vancouver 8, Canada.

Received 29 May 1973; accepted 25 July 1973.