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The infectious ribonucleic acid (RNA) of potato spindle tuber virus (PSTV) can be separated by hydroxyapatite chromatography from double-stranded RNA detectable in low amounts in both infected and uninfected plant tissue extracts. The chromatographic behavior of ribonuclease-sensitive PSTV RNA resembles that of transfer RNA.

Separation of the Infectious Ribonucleic Acid of Potato Spindle Tuber Virus from Double-Stranded Ribonucleic Acid of Plant Tissue Extracts