In infected embryonic mule skin cells, Berne virus directs the synthesis of two main polypeptides (22K, 20K); in addition, virus-specific proteins with apparent molecular weights of >200K, 80K to 120K, 32K and 17K were detected after radioimmune precipitation. The replication of Berne virus was reduced more than 1000-fold by actinomycin D, when the drug (0.1 to 1.0 µg/ml) was added during the first 8 h after infection; alpha-amanitin (25 µg/ml) produced a similar though less pronounced effect. U.v. preirradiation of the cells for ⩾ 5s led to a dramatic decrease in the production of extracellular virus. The results presented support our suggestion that Berne virus is a representative of a new family of animal viruses.

Keyword(s): Berne virus , inhibitors and polypeptides

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