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Table 3 Number of loci in E. coli alignments corresponding to known elements

From: Small variable segments constitute a major type of diversity of bacterial genomes at the species level

  E. coli E. coliB2
  All loci Microdiversity loci All loci Microdiversity loci
  n Percent n Percent n Percent n Percent
Total 1,037 100 640 100 539 100 370 100
Bacteriophages 27 3 0 0 35 6 12 3
CRISPR 3 0.3 1 0.1 3 2 1 0.2
Genomic islands 127 12 61 10 103 19 64 17
Insertion sequences 55 5 2 0.3 48 9 8 2
Palindromic units 129 12 105 16 44 8 37 10
Minisatellites 18 2 12 2 17 3 15 4
Other 678 65 459 72 289 53 233 63
  1. CRISPR, clustered, regularly interspaced short palindromic repeat.