Intact nucleoproteins of several isolates of Prunus necrotic ringspot virus (PNRSV) from cherry, peach, almond, and hop resolved as three components in rate-zonal sucrose density gradients and as two or three components on electrophoresis in agarose slab gels. Electrophoretic mobilities of the various nucleoprotein components differed among isolates. When electrophoresis was conducted on cellulose acetate sheets, PNRSV nucleoproteins resolved as single bands with marked differences in mobility noted among isolates (...)
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J. M. Crosslin (1992) studied this question.