I am a new graduate student. When I was doing the yeast self-activation test, I met the following questions. Could you please answer them? Y2HGold has four reporter genes: AbA, HIS, ADE, and MEL. GAL4 causes the expression of four genes in the presence of self-activation. My question is whether Gal4 causes the expression of all four genes, and whether it activates only some of the reporter genes, but not all of the reporter genes