Abstract

Radioactively labeled nucleic acids prepared from the nuclear fraction from Chinese cabbage leaf tissue infected with turnip yellow mosaic virus (TYMV) contained two components not present in equivalent material from healthy leaves. One of these components had the properties expected for a virus-specific double-stranded RNA; the other contained DNA, with properties expected for DNA-RNA hybrids. In leaf tissue supplied with 3H-thymidine this DNA reached maximal labeling much more rapidly than the rest of the DNA.

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