You have isolated two different mutants (reg1 and reg2) causing constitutive expression of the emu operon (constitutive expression of emu1 and emu2)
January 9th, 2018
You have isolated two different mutants (reg1 and reg2) causing constitutive expression of the emu operon (constitutive expression of emu1 and emu2). One mutant contains a defect in a DNA binding site, and the other has a loss-of-function defect in the gene encoding a protein that binds to the site. Is the DNA binding protein a positive or negative regulator of expression?