title: DNA sequence of the mini-insertion IS2--6 and its relation to the sequence of IS2.
abstract: In polar IS2 abolishes galactose operon expression. Operon activity is restored by a 108 base pair mini-insertion within IS2 called IS2--6. The DNA sequences of the gal operon-IS2 junction, the parental IS2 region undergoing sequence rearrangements and IS2--6 itself are reported. IS2--6 is composed of sequence intervals present in both strands of IS2.
mesh_terms: D001483:Base Sequence; D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial; D004261:DNA Replication; D004269:DNA, Bacterial / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics* / Q000648:ultrastructure; D005690:Galactose / Q000235:genetics*; D009876:Operon
chemical_list: D004269:DNA, Bacterial; D005690:Galactose