Turnip Yellow Mosaic Virus RNA directs the synthesis in vitro of its coat protein in a wheat germ cell-free extract. Optimum conditions for synthesis have been defined, and the effect of spermine on specifically enhancing coat protein formation has been examined. Identity between the in vitro synthesized coat protein and authentic coat protein of Turnip Yellow Mosaic Virus was established by an...

A mosaic disease of turnip [Brassica rapa L.) occurs on Long Island, N. Y. Typical specimens of this disease were obtained for comparative greenhouse studies with virus diseases affecting certain cultivated crucifers in California {lô, 16,17,18)} It is the purpose of this paper to describe briefly the symptoms of this mosaic disease of turnip from New York, to present experimental evidence on t...

The serological interrelationships between eleven viruses in the turnip yellow mosaic virus group (tymoviruses) were studied with 2% antisera from 48 rabbits. Antisera from different rabbits and from different bleedings of the same rabbit showed considerable differences in their homologous and heterologous reactivities. A classification based on average serological differentiation indices is pr...