title: "Second" and "third operator" of the lac operon: an investigation of their role in the regulatory mechanism.
mesh_terms: D001665:Binding Sites; D003090:Coliphages / Q000235:genetics; D004279:DNA, Viral; D007763:Lac Operon; D012097:Repressor Proteins
chemical_list: D004279:DNA, Viral; D012097:Repressor Proteins