Yeast vectors and assays for expression of cloned genes

This unit describes some of the most commonly used yeast vectors, as well as the cloned yeast genes that form the basis for these plasmids. Yeast vectors can be grouped into five general classes, based on their mode of replication in yeast: YIp, YRp, YCp, YEp, and YLp plasmids. With the exception of the YLp plasmids (yeast linear plasmids), all of these plasmids can be maintained in E. coli as well as in S. cerevisiae and thus are referred to as shuttle vectors. The nomenclature of different classes of yeast vectors, as well as details about their mode of replication in yeast are discussed.