 He lists the components of the regulatory system as i, the regulator gene that directs constant synthesis of the repressor protein (R), o, the operator segment of DNA that the repressor specifically recognizes and forms a stable complex with, and p, the DNA promoter where RNA polymerase binds.Synthesis of mRNA is blocked when the repressor is bound to the operator.When the repressor is in the free state it is able to recognize and bind beta galactosides thus dissociating the operator repressor complex and permitting synthesis of the mRNA and protein.