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Comparison of Structural Proteins from Two Potato Yellow Dwarf Viruses

University of Stuttgart, Institute for Biology, 7 Stuttgart 60, Federal Republic of Germany
and¹ American Type Culture Collection, Rockville, Maryland 20852, U.S.A.

The structural proteins of the two serotypes of potato yellow dwarf virus, SYDV and CYDV, were isolated after labelling in vitro with either dansyl chloride or ¹²⁵I. Five different structural proteins were detected for each virus by SDS-polyacrylamide gel electrophoresis. The molecular weights of the G, M₁ and M₂ proteins differed between SYDV and CYDV. Four structural proteins. G, N, M₁ and M₂, of thetwo viruses were also compared by peptide mapping after partial proteolysis. The order of similarity between the homologous proteins of each strain was M₂ (least similar) < G < N < M₁.

Keywords: PYDV, structural proteins, rhabdoviruses, vector specificity

Received 6 September 1983; accepted 31 January 1984.