For example, repression of the lac operon by its repressor, called lacI, is inhibited by the ligand allolactose, to which the repressor protein directly binds. Thus, lactose, from which ...

2. a. You would not expect the addition of lactose to induce b-galactoside permease z-y + mutants; lactose canot be leaved to form allolactose, which is the required inducer. The addition of ...