Table 1. Identification and family distribution of S. Typhimurium TA loci.

Module (The gene of the operon coding for the toxin is underlined)	Homologue (based on the toxin)	Superfamily	Reference
STM1550-STM1551	relEB (E. coli)	RelE	[51]
STM2954.1N-STM2955.S	mazEF (E. coli)	MazF	[52], [9]
STM3033-STM3034	vapBC (E. coli and S. flexneri)	VapC	[17]
STM3516-STM3517	dinJ-yafQ (E. coli)	RelE	[53]
STM3558-STM3559	phd-doc (E. coli)	Doc	[54]
STM3777-STM3778	relEB (E. coli)	RelE	[51]
STM4030.S-STM4031	higBA (E. coli and V. cholerae)	RelE	[40], [55]
STM4032.2N-STM4033	higBA (E. coli)	RelE	[9], [40]
STM4449-STM4450	relEB (E. coli)	RelE	[51]
PSLT027-PSLT028	ccdAB (E. coli)	CcdB	[56]
PSLT106-PSLT107	vapBC (E. coli and S. flexneri)	VapC	[17]