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.
What Rubber is Made From Rubber is just a combination of polymers of isoprene units and other natural substances and impurities. It is a build up of the isoprene unit molecules and is not normally made up of other synthetic materials (although sometimes these materials are used to sythesise rubber).Natural rubber comes from the sap of the rubber tree.Today's rubber is mostly a synthetic, formed from substances like latex. jb answer real rubber comes from the sap of the rubber tree. synthetic rubber does not come from latex, but is made from oil.oday's rubber is mostly a synthetic, formed from substances like latex. jb answer real rubber comes from the sap of the rubber tree. synthetic rubber does not come from latex, but is made from oil.