A consensus of 5′-TAAPuTPyNCTGTPuTNTGTTTTGTTTG-3′ in the vicinity of the T-DNA right border of some octopine plasmids facilitating the transfer of the T-DNA into the plant chromosomes. The VirC1 protein binds this region. In the overdrive mode of the RNA polymerase the system does not respond to protein signals of transcription termination or pause.   Agrobacterium ,  T-DNA,  virulence genes of Agrobacterium,  antitermination,  terminator,  transcription factors,  RNA polymerase; DeVos G Zambryski P 1989 Mol Plant-Microbe Interact 2:43.