Abstract

African swine fever (ASF) virus was grown either in swine macrophages or in VERO cells and purified free of cell DNA. Virus DNA was isolated from virions as a molecule with a sedimentation coefficient of 60S and a contour of 58 +/- 3 mum. .these two values give a mol. wt. of 102 +/- 5 X 10(6) and 107 +/- 5 X 10(6), respectively, for the genome of ASF virus. Denatured DNA fragments from ASF virus reassociate with a C0t1/2 value of 0-60 +/- 0-05 MS, which compared with the corresponding value for T4 DNA gives for the molecular mass of ASF virus DNA a value of 102 +/- 8 X 10(6) daltons. Only virus DNA is synthesized ASF virus-infected swine macrophages.

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