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We measured the translational diffusion of fractions of dextrans labelled with fluorescein isothiocyanate, in Sephadex gel beads permeated by aqueous solutions of these molecules. The molecular weights of these fractions were between 5400 and 200,000 and measurements of their diffusion coefficients inside a gel bead (D) and in the free solution (D0), were(More)
Oncornaviral particles on the way of their synthesis have been isolated from cytoplasm of a Friend virus-producing murine cell line. By use of electron microscopy and retrotranscriptase assay, it was found that the majority of the viral structures is pelleted by sedimentation at 90.000 g. The Poly (A) RNA of this pellet contains principally 70S and 35S RNA(More)
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