Figure 2From: Poly purine.pyrimidine sequences upstream of the beta-galactosidase gene affect gene expression in Saccharomyces cerevisiaePoly purine, duplex sequences and construction of yeast expression vectors with these sequences. (a) Poly pur.pyr and duplex control sequences flanked by a Xho1 site were cloned at the junction of the cycl promoter and UASg.Back to article page