Conceivably a nus mutation might act by causing a host protein to inactivate the N protein of phage lambda. Although a complicated biochemical experiment could be used to test this idea, what simple...

Conceivably a nus mutation might act by causing a host protein to inactivate the N protein of phage lambda. Although a complicated biochemical experiment could be used to test this idea, what simple genetic experiment could disprove the proposal? Devise a selection or scoring method for the isolation of CI mutations that repress normally but do not stimulate pRM.