Abstract:Exocellular structures containing VirB2 proteins were, for the first time, localized on the surface of Agrobacterium by transmission electron microscopy. Using colloidal gold (CG)-labeled VirB2-specific antibodies, it was shown that VirB2 proteins enter into the composition of short surface pili, which emerge at the poles of acetosyringone (AS)-inducedAgrobacterium cells. However, cells of the Ti plasmidless A. tumefaciens strain UBAPF-2 and cells not induced with AS were incapable of pilus synthesis. In suspe… Show more
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