Practice question

Question

The following statements are made regarding TAL effectors that play an important role during bacterial pathogenesis in plants. A. They are bacterial proteins that are translocated into the host plant cells using the type IV secretion system. B. They harbour a central DNA-binding region comprising a tandem array of nearly identical repeats. C. They can act as both virulence factors as well as avirulence factors. D. They are only restricted to members of the Xanthomonas species that infect rice. Which one of the following options represents the combination of all correct statements?