Fig. 1.

Concentration of PBCV-1 and NY-2A DNA fragments in infected Chlorella NC64A cells. (a) Concentration of DNA fragments in cells inoculated with either virus PBCV-1 or virus NY-2A under control conditions (shaded bars), in the presence of 20 mM BaCl₂ (solid bars) or 20 mM CsCl (open bars). The numbers above the bars give the estimated number of DNA fragments per infected cell. (b) Inhibition of virus-specific DNA fragment synthesis in Chlorella cells inoculated with virus NY-2A as a function of Cs⁺ concentration. Data are means±sem of ≥3 independent experiments. In some cases, the sem is smaller than the symbols.