Purification of Large Amounts of Murine Ribonucleic Acid Tumor Viruses Produced in Roller Bottle Cultures

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Abstract
Murine ribonucleic acid tumor viruses and C-type virus particles are produced in relatively large quantities in roller bottle cultures. The viruses present in large volumes of culture fluids can be purified by a simple two-step procedure involving polyethylene glycol precipitation and equilibrium centrifugation in sucrose density gradients. Images