TABLE 2.

Bacterial strains and cosmids/plasmids used in this work.

Strain	Description	References
S. ambofaciens ATCC 23877	Wild type	Pinnert-Sindico, 1954
S. ambofaciens ΔΔalpW	alpW loci replaced by a scar	Bunet et al., 2011
S. ambofaciens ΔΔalpWΔΔalpID	alpW and alpIABCD loci replaced by a scar	This work
F6ΔΔalpID:scar	genomic library cosmid F6 with locus alpID replaced by a scar	Pang et al., 2004
Escherichia coli ET12567	strain used for interspecific conjugation	MacNeil, 1988
pUZ8002	for in trans mobilization of oriT containing cosmid	Paget et al., 1999