Effect of Vpr, hVIP/MOV34 sense, and hVIP/MOV34 antisense expression on histone H1 kinase activity. Cyclin B1 was immunoprecipitated from RD cell extracts and incubated with [γ- 32 P]ATP in the presence of exogenously added histone H1. Quantification of kinase activity by densitometry scanning was plotted. ( Inset ) Autoradiogram.
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