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Agrobacterium attachment to petunia protoplasts and HeLa cells. (A and B) Wild-type Agrobacterium incubated with petunia protoplasts and HeLa cells, respectively. (C and D) chvA mutant of Agrobacterium incubated with petunia protoplasts and HeLa cells, respectively. (E and F) chvB mutant of Agrobacterium incubated with petunia protoplasts and HeLa cells, respectively. (Bars = 50 μm.)
