Researchers have identified mutations in the promoter region of the lacI gene that lead to increased production of the lacI repressor protein.

Researchers have identified mutations in the promoter region of the lacI gene that lead to increased production of the lacI repressor protein. In these mutants, it is more difficult for the lac operon to be induced. Explain why an increase in lacI protein makes it more difficult to induce the lac operon in the presence of lactose.