title: Complexes of Escherichia coli lac-repressor with non-operator DNA revealed by electron microscopy: two repressor molecules can share the same segment of DNA.
mesh_terms: D001665:Binding Sites; D004247:DNA; D004926:Escherichia coli / Q000235:genetics / Q000648:ultrastructure*; D005809:Genes, Regulator; D007785:Lactose / Q000378:metabolism*; D008854:Microscopy, Electron
chemical_list: D004247:DNA; D007785:Lactose