. 2015 May 26;10(5):e0127446. doi: 10.1371/journal.pone.0127446

Table 2. DNA restriction-modification genes in E. coli K-12 MG1655. ^a .

	Gene	Product	Activity
DNA MTases
	dam	orphan MTase M.EcoKDam	G^m6ATC
	dcm	orphan MTase M.EcoKDcm	C^m5CWGG
	yhdJ	orphan MTase M.EcoKII	ATGC^m6AT (silent)
	hsdM	Type I MTase M.EcoKI	A^m6ACNNNNNNGTGC
Other Genes
	hsdR	Type I restriction ENase R.EcoKI
	hsdS	Type I specificity subunit S.EcoKI
	mcrA	Type IV restriction ENase
	mcrBC	Type IV restriction ENase
	mrr	Type IV restriction ENase

^a All of these genes have been deleted or otherwise inactivated in ER2796 except for yhdJ, which is additionally inactivated in ER3413.

Table 2. DNA restriction-modification genes in E. coli K-12 MG1655. a .