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Nucleic acid synthesis during the focus formation by Shope fibroma virus on green monkey kidney cells

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Summary

Nucleic acid synthesis during the focus formation on Shope fibroma virus (SFV)-infected cells was studied. When African green monkey kidney (AGMK) cells were infected with SFV, the “cell-focus” was observed as a local piling up of cells at 3 to 5 days after infection. The number of foci increased in proportion to the size of the SFV inoculum. In the SFV-AGMK cell system, however, the growth rate of virus was comparatively low and no apparent cytopathic effect was demonstrated as a result of virus infection. The incorporation of3H-thymidine into the nuclear fraction of infected cells was suppressed early in the cycle of virus replication and before focus formation. On the other hand, the rate of DNA synthesis increased markedly in the infected cytoplasm. Cytoplasmic RNA synthesis also tended to increase gradually accompanying the induction of the viral DNA synthesis. In addition, the sedimentation properties of the newly synthesized DNA were investigated by sucrose density gradient centrifugation.

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  1. M. Takehara

    Present address: Department of Microbiology, Kobe University School of Medicine, Kobe, Japan

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    Takehara, M. Nucleic acid synthesis during the focus formation by Shope fibroma virus on green monkey kidney cells. Archiv f Virusforschung 31, 303–312 (1970). https://doi.org/10.1007/BF01253765

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    • DOI: https://doi.org/10.1007/BF01253765

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