TABLE 3.

IS element remnants

IS element homology	Location (bp)	Gene(s) presentb	No. of inverted repeats present
IS1616	4187–4519	′OrfB	1
	69062–69456	′OrfA, OrfB′	1
ISD1-likea	12265–12608	′OrfB	0
	14571–15326	OrfA, OrfB	1
	49642–49942*	′OrfB′	0
	66594–66926*	′OrfB′	0
IS1617	9218–9829	′OrfB	1
IS1222	58073–58749	′OrfB	1
	60419–60470	None	1
IS285	11939–12249	None	1
	41978–42191	Orf1′	1
IS21	58748–60418	istA, istB′	1
Tn1000	63528–66582	tnpR, ΔtnpA	1
IS6100-like	42247–42820	Δtnp	?
	46470–46664	Δtnp	?
ISRm3-like	44777–45191	Δtransposase	?
IS1327-like	55656–56005	ΔtnpA	?

^aMembers of this group have amino acid homology. Only those indicated by an asterisk show similarities at the nucleotide sequence level. 

^bOrfA = lcrS; OrfB = lcrT.