Table 2.

Ability of BREX^Ec to protect cells from infections other than λ

Phage	Genome	Number of GGTAAG sites	BREXEc protection*
Qβ	ssRNA	3**	100
M13	ssDNA	3***	100
T4	dsDNA	40	100
T4147	dsDNA	39	>1011
T5	dsDNA	65	102
T7	dsDNA	44	102
VR5	dsDNA	85	100
VR7	dsDNA	66	>1011
VpaE1	dsDNA	88	>1010
λ	dsDNA	18	102

*The ratio of the number of phage plaques on the BREX- lawn to the number of plaques on the BREX+ lawn.

**GGUAAG sites.

***Positive strand.