在半乳糖的诱导下,酵母Gal4结合在半乳糖代谢酶系GAL基因启动子的上游激活序列(Upstream activating sequence,UAS)上,调控Galactokinase(Gal 1),Galactose permease(Gal2),Galactose 1-phosphate uridyltransferase(Gal7),Galactose mutarotase and UDP-galactose 4-epimerase(Gal10)等基因的转录。 酵母单杂交与酵母双杂交...