title: Insertion element IS121 is near proA in the chromosomes of Escherichia coli K-12 strains.
abstract: Insertion element IS121 was mapped between proA and a previously mapped IS5A element in two F-prime plasmids. Results of hybridizations of IS121 to chromosomal DNA from four other strains suggest that IS121 is normally present at this position in the chromosomes of Escherichia coli K-12 strains.
mesh_terms: D002874:Chromosome Mapping; D002876:Chromosomes, Bacterial / Q000502:physiology*; D004262:DNA Restriction Enzymes; D004251:DNA Transposable Elements; D004926:Escherichia coli / Q000235:genetics*; D005144:F Factor; D009693:Nucleic Acid Hybridization; D013045:Species Specificity
chemical_list: D004251:DNA Transposable Elements; D004262:DNA Restriction Enzymes