Host-vector systems

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Abstract
In 1980 it was only possible to express foreign genes in bacteria and a few easily cultured animal cells. During the subsequent eight years specialized vectors have been developed to allow the genetic manipulation of a wide range of both prokaryotes and eukaryotes. One of the major goals of biotechnology in 1980 was to use host cells as ‘factories’ for the production of proteins that were only available in minute quantities from natural sources. This has already lead to a new generation of pharmaceutical products. Advances in our understanding of host-vector systems have defined new goals. The basic concepts of expression vector design will be illustrated. Some of the new goals are discussed with particular reference to the exploitation of novel host-vector systems to develop vaccines and anti-viral agents against AIDS.
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