TABLE 1.

Strains used in this study.

Strain	Species	Genotype	Abr	Reference
PY79	B. subtilis	Prototroph SPβ, ICEBs1 −	–	BGSC
PY79 ΔcomK	B. subtilis	PY79; comK::spec	spec	This work
PY79 pNZ8048	B. subtilis	PY79; pNZ8048	cm	This work
168	B. subtilis	trpC2	–	BGSC
168 pNZ8048	B. subtilis	168 trpC2, pNZ8048	–	BGSC
168 ΔcomK	B. subtilis	168 trpC2, comK::spec	spec	Laboratory stock
168 ΔamyE	B. subtilis	168 trpC2, amyE::tet	tet	Laboratory stock
MG1363	L. lactis	Plasmid‐free derivative of NCDO712 (Prt‐, Lac‐)	–	Gasson (1983)
MG1363 GFP+	L. lactis	MG1363; pseudo10::Pusp45‐sfGFP(Bs)	ery	Overkamp et al. (2013)
MG1363 ΔcluA	L. lactis	MG1363; ΔcluA	–	This work
MG1363 GFP+ ΔcluA	L. lactis	MG1363_sfgfp(Bs); ΔcluA	ery	This work
MG1363 pNZ8048	L. lactis	MG1363; pNZ8048	cm	This work
MG1363 ΔcluA pNZ8048	L. lactis	MG1363; ΔcluA, pNZ8048	cm	This work
MG1363 pNZ521	L. lactis	MG1363; pNZ521	cm	This work
MG1363 ΔcluA pNZ521	L. lactis	MG1363; ΔcluA, pNZ521	cm	This work
CNRZ302 pNZ8048	S.thermophilus	pNZ8048	cm	This work
ST11 pNZ8048	S.thermophilus	pNZ8048	cm	This work