When added to extracts from commercial wheat germ, tobacco rattle virus (TRV) RNA stimulated incorporation of radioactive amino acids into protein with an efficiency approaching that of tobacco mosaic virus (TMV) RNA. RNA from the smaller particle (RNA-2) of the CAM strain of TRV was translated largely into a single polypeptide which coelectrophoresed with coat protein and aggregated specifically with unlabeled protein. Coelectrophoresis with coat protein in 3% acrylamide gels indicated a C-terminal sequence in the radioactive product similar to that in coat protein. Attempts to change the pattern of translation products by heating RNA, adding coat protein to incubations, or changing RNA concentration were unsuccessful. RNA from the larger particle (RNA-1) of strain CAM (Campinas) was translated into a variety of products with a maximum molecular weight of 100,000. When mixtures of RNA-1 and RNA-2 were used, RNA-2 was translated preferentially. © 1976.
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