title: Comparison of IS1, IS2 and IS3 copy number in Escherichia coli strains K-12, B and C.
abstract: The number of copies of IS2 and IS1 in the chromosomes of five Escherichia coli K-12 strains and E. coli B and E. coli C has been determined by hybridization. Among these strains, IS1 copy numbers range from 4 to 19 and IS2 copy numbers range from 0 to 12. IS2 is present once in the E. coli B chromosome, but it is absent from E. coli C. The copy numbers of IS3 in the same seven E. coli strains range from 4 to 6.
mesh_terms: D010582:Bacteriophage lambda / Q000235:genetics; D002876:Chromosomes, Bacterial / Q000032:analysis*; D004262:DNA Restriction Enzymes; D004251:DNA Transposable Elements; D004269:DNA, Bacterial / Q000235:genetics*; D004279:DNA, Viral / Q000235:genetics; D004926:Escherichia coli / Q000145:classification / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D004251:DNA Transposable Elements; D004269:DNA, Bacterial; D004279:DNA, Viral; D004262:DNA Restriction Enzymes