The right end of the vir region of an octopine-type Ti plasmid contains four new members of the vir regulon that are not essential for pathogenesis.

@article{Kalogeraki2000TheRE,
  title={The right end of the vir region of an octopine-type Ti plasmid contains four new members of the vir regulon that are not essential for pathogenesis.},
  author={Virginia S. Kalogeraki and Jianghai Zhu and Janet Stryker and Stephen C Winans},
  journal={Journal of bacteriology},
  year={2000},
  volume={182 6},
  pages={1774-8}
}
We sequenced the virD-virE, virE-virF, and virF-T-DNA intergenic regions of an octopine Ti plasmid. Four newly described genes were induced by the vir gene inducer acetosyringone, two of which are conserved in the nopaline-type Ti plasmid pTiC58. One gene resembles a family of phosphatase genes. Each of these genes is dispensable for tumorigenesis.