Abstract
Summary
A combined culture-dialysis chamber was devised for producing BAI strain A virus in vitro in amounts greatly increasing the scope of physical and chemical studies of the agent. The yield of virus was approximately 15 mg dry wt/day/chamber. Infectivity of the culture virus was the same on a particle basis as that of virus from leukemic chicks. Properties of the culture virus were indicated by gradient centrifugation, gel electrophoresis and by the character of RNA extracted from the agent.
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