TABLE 1.

Bacterial strains used in this study

Strain	Description	Reference or source
E. coli
TOP10	E. coli cloning strain	Invitrogen
BL21 DE3	IPTG-inducible T7 expression strain	34
S. aureus
RN4220	Restriction deficient 8325-4	Laboratory stock
8325-4	Wild-type 8325 cured of prophages	15
8325-4 gapA strain	8325-4 ΔgapA::tet	This study
8325-4 gapB strain	8325-4 ΔgapB::spc	This study
8325-4 gapA gapB strain	8325-4 ΔgapA::tet ΔgapB::spc	This study
8325-4 gapR strain	8325-4 ΔgapR::spc	This study