Table 2. Full length group II intron copies, number of potential homing sites available in their host genomes, and proportion of homing site occupation.

Group II intron	Host genome	Copy number	Available homing sites	Proportion of occupation (%)
E.c.I2	E. coli UMN026	1	4	20
E.c.I3	E. coli ED1a	2	0	100
	E. coli 536	1	0	100
E.c.I4	E. coli ED1a	2	1	67
	E. coli 55989	6	1	86
	E. coli E24377A	7	0	100
	E. coli IAI39	15	27	36
	E. coli SMS_3_5	1*	/	/
	E. coli UTI89	1	2	33
	E. coli UMN026	1	6	14
	S. flexneri Sf301	1	42	2
	S. flexneri 2457T	1*	/	/
E.c.I5	E. coli EDL933	1	/	/
	E. coli Sakai	1	/	/
E.c.I6	E. coli ED1a	1*	/	/
	E. coli CFT073	1*	/	/
	E. coli APEC_01	1*	/	/
	E. coli S88	1*	/	/
E.c.I9	E. coli ATCC_8739	1	6	14
Kl.pn.I5	K. pneumoniae MGH	2	0	100
Di.da.I1	D. zeae Ech1591	1	/	/
	D. dadanti Ech703	1	/	/
Di.ze.I1	D. zeae Ech1591	2	17	11
P.l.I1	P. luminescens TT01	1	/	/
P.l.I2	P. luminescens TT01	1	/	/
So.gl.I1	S. glossinidius 'morsitans'	3	73	4
c-Ha.de.I1 (subgroup 1)	H. defensa 5AT	26	17	60
c-Ha.de.I1 (subgroup 2)	H. defensa 5AT	3	1	75
c-Ha.de.I2	H. defensa 5AT	1	/	/

^*: inactivated copies located within free or integrated large MGE.