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. coli*B2
	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

CRISPR, clustered, regularly interspaced short palindromic repeat.

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