Definitions for "Expression system"
in genetic engineering, the cells (host organism) into which a gene is inserted to manufacture desired proteins; the gene is combined with a genetic vector (such as a virus or circular DNA molecule called a plasmid) to provide the genetic context in which it will function in the cell; that is, the gene will be expressed as the protein of interest.
A cell culture system into which a foreign DNA can be introduced as part of a specialized vector that enables it to be expressed as protein.
A cell-based protein synthesis system programmed by an expression vector.