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J Gen Virol 3 (1968), 427-432; DOI 10.1099/0022-1317-3-3-427
© 1968 Society for General Microbiology
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Purification and Fractionation of Alfalfa Mosaic Virus with Polyethylene Glycol

M. F. Clark

Plant Diseases Division, D.S.I.R., Palmerston North, New Zealand

Preparations of alfalfa mosaic virus made by precipitation with polyethylene glycol were as infective and contained the same relative proportions of components as virus preparations made by ultracentrifugation. A column chromatographic procedure using a continuously decreasing concentration gradient of polyethylene glycol was employed to fractionate the nucleoprotein components of the virus. By this procedure a partial sorting of the virus components into three groups according to particle length was achieved. Particles in the three groups are thought to correspond to top component a, top component b, and a mixture of middle and bottom components.

Received 26 March 1968; accepted 1 June 1968.




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Copyright © 1968 by the Society for General Microbiology.