RNA-dependent RNA polymerase associated with particles of lettuce necrotic yellows virus.

Carbon Isotopes Centrifugation, Density Gradient Chemical Precipitation Ethanol Genetics, Microbial Hot Temperature Immunodiffusion Microscopy, Electron Nucleic Acid Hybridization Phosphotungstic Acid Plant Viruses/enzymology,isolation & purification,metabolism Plants, Edible RNA Nucleotidyltransferases/metabolism RNA, Viral/biosynthesis Ribonucleases Staining and Labeling Sucrose Templates, Genetic Uracil Nucleotides/metabolism Uridine/metabolism Vegetables Virus Cultivation

Carbon Isotopes RNA, Viral Uracil Nucleotides Phosphotungstic Acid Ethanol Sucrose RNA Nucleotidyltransferases Ribonucleases Uridine