10.1 Introduction Operator is the site on dna at which a repressor protein binds to prevent transcription from initiating at the adjacent promoter. Repressor protein binds to operator on dna or rna to prevent transcription or translation. respectively Structural gene codes for any rna or protein product other than a regulator 请莘大Operator is the site on DNA at which a repressor protein binds to prevent transcription from initiating at the adjacent promoter. Repressor protein binds to operator on DNA or RNA to prevent transcription or translation, respectively. Structural gene codes for any RNA or protein product other than a regulator. 10.1 Introduction