Table 1.

Overview of toxin/antitoxin‐based addiction systems that were described in literature.

Name of locus	Toxin/antitoxin	Organism	References
hok/sok	Hok/Sok	E. coli	Gerdes et al. (1986a,b); Gerdes (1988); Thisted and Gerdes (1992); Pedersen and Gerdes (1999); Kobayashi (2004)
par	RNA I/RNA II	E. faecalis	Weaver and Tritle (1994); Weaver et al. (1996; 2004); Greenfield et al. (2000)
ldrD–rdlD	LdrD/RdlD	E. coli	Kawano et al. (2002)
ratA–txpA	RatA/TxpA	B. subtilis	Silvaggi et al. (2005)
symER	SymR/SymE	E. coli	Kawano et al. (2007)