This effect raises the occupancy of the primary operator, the fraction of primary operator sequences bound by LacR, from 0.79 to between 0.985 and 0.998, a value essentially insensitive to helical phasing (Figure 7, upper panel).
Plaintiffs in the case say that drilling by Texaco Petroleum polluted the soil and groundwater in 11,000 acres of the Ecuadorean Amazon from 1974 to 1990, when the company was the primary operator of Ecuador's oil industry.
BINA Istra, the primary operator of the route, leases the type A, B, and C service areas to various operators through public tenders.
DNA looping between the primary operator and either of the auxiliary operators enhances occupancy of the primary site by LacR [2], [3], thereby blocking transcription by preventing RNA polymerase binding to the promoter.
For a two-operator system, occupancy of the primary operator (Figure 7, upper panel) involves a looped state and two unlooped states (Figure 4).
Trainees were the primary operator in almost half of the upper gastrointestinal endoscopy procedures recorded (679 of 1,369; 49.6%).
The school-trained drivers will continue to be the primary operators of fire vehicles, officials said.
These samples are supplemented by Marcellus shale gas (four samples, four gas wells) collected by Cabot (a primary operator in the area) from within the production casing of additional gas wells in the Dimock Township.
