Figure 2From: Construction of a novel Pichia pastoris strain for production of xanthophyllsConstruction of plasmids pGAPZA-W and pGAPZA*-Z, containing ctrW and ctrZ genes, respectively. The expression plasmid pGAPZA-WZ, coding for both ctrW and ctrZ, was used to transform P. pastoris Pp-EBIL cells. Plasmid pGAPZA* represents a plasmid pGAPZA in which the Avr II restriction site has been eliminated by mutation.Back to article page