The Correlation among Viral Axes，Triangulation Number and Capsomeres

very best choice of several rnain affecfing factore on the crude purification of PRV was reporteddetailediy in this paper.The advanee purification method of PRV with the Cs SO4 continuous densitygradient supercentrifusation for about 3 hours with 30% sugar cushion was tested for the first time.Asimple procedure of one cycle of different speed centrifugution and one cycle of Cs2SO4 continuous density gradient supercentrifugation was designed at last.The virus preparation showed a typical ultravio let absorption curve for nucleoproteiris,The yield of virus was 2.56mg/100g of infected squashleaves.