Table 1.

Bacterial strains

Strain	Relevant genotype/phenotype	Reference
E. coli
DH5α	Cloning host	6
LMG194	Protein expression host for vectors with arabinose-inducible promoters	27
S17-1	Strain used for conjugative plasmid transfer to L. monocytogenes	55
L. monocytogenes
EGDe	Wild-type L. monocytogenes	24
Δlmo1722 strain	EGDe with lmo1722 deleted	This study