Proteinase K-sensitive Factor Essential for the Infectivity of Southern Bean Mosaic Virus Ribonucleic Acid. V. Veerisetty and O. P. Sehgal, Department of Plant Pathology, University of Missouri, Columbia, 65211.  Phytopathology 70:282-284.

Treatment with Proteinase K reduced the infectivity of southern bean mosaic virus ribonucleic acid (SBMV-RNA) but not that of tobacco mosaic virus RNA.  The structural integrity of the viral RNAs remained unaffected after the Proteinase K treatment.  The Proteinase K-sensitive moiety was associated intimately with SBMV genome.