TABLE 2.

Summary of PA103 and mutant phenotypes

Strain	Invasiveness	Cytotoxicitya	Putative type III proteins secreted	Similarity of sequence at Tn5 insertion sitea	Postulated delivery to host cell of Putative AIFb
PA103	No	Yes	PepA, PepB, PepD, ExoT		+
Mutant 16	Yes	No		Not tested	−
Mutant M	Yes	No		yscN	−
Mutant N	Yes	No		pscJ, yscJ	−
Mutant P	Yes	No	PepA, PepB, PepD, ExoT (variable amounts)	Not tested	+/−
Mutant Q	Yes	No		Not tested	−
Mutant 1	Yes	No	PepA, ExoT	None	−
Mutant 8	No	Minimal	PepB, PepD, ExoT	pepA/exoU	+
Mutant 13	No	Minimal	PepB, PepD, ExoT, truncated PepA	pepA/exoU	+

^aData from reference 22. 

^bSee Fig. 4.