The lac repressor and the lac operator.
D001426:Bacterial Proteins; D001665:Binding Sites; D004269:DNA, Bacterial; D003851:Deoxyribonucleases; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli; D005809:Genes, Regulator; D007700:Kinetics; D007785:Lactose; D008970:Molecular Weight; D009876:Operon; D010759:Phosphorus Isotopes; D011485:Protein Binding; D012967:Sodium Dodecyl Sulfate
D001426:Bacterial Proteins; D004269:DNA, Bacterial; D010759:Phosphorus Isotopes; D012967:Sodium Dodecyl Sulfate; D003851:Deoxyribonucleases; D007785:Lactose