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.
It is made of cellulose derived from specially processed wood pulp. Viscose is very similar to cotton and silk. (Cotton is also made of cellulose). Various processes turn the cellulose into a thick spinning solution which is pressed through fine spinnerets.reated from a combination of natural and man-made components, viscose can also be made into the more common form of rayon that is used for many types of textile product, including clothing. Viscose rayon has a silky appearance and feel, and also has the ability to breathe in a manner similar to cotton weaves.