In a typical expression vector, the polyhedrin (polh) gene, which codes for the major protein in the occluded form of the virus, is replaced by a transgene of interest. The transgene can then be expressed under the control of the polh promoter to achieve maximal protein expression in their natural hosts, insect cells.
Commercial rubber is a product that is important to the convenience of our everyday lives. We find it in our tires, our shoes, our flooring, adhesives, and in a plethora of small items that are all made from rubberâwhile the products themselves may be small in size, their significance is usually much larger. In any case, rubber is made from two main sources: naturally-produced latex and petroleum.
Unlike many other traditional roof shingles and rolls, which are mainly composed of slate, wood, ceramic, asbestos, or bitumen-soaked paper, rubber roofing shingles are usually be made from recycled (vehicle) tires (a tremendous source of waste material), sawdust and slate dust. The rubber roofing shingles manufacturing process looks the following: 1  the tire wall is removed and the tread section gets cut into large pieces;  treading gets buffed off and the rubber surface is coated with slate dust or sawdust (comes from recycled sources, like recycled slate tiles or mills);