aThe λ prophage genes int-xis-exo-bet-gam-kil in strain Y836 were substituted with bio275 [13]. The strain carries the chromosomal deletion Δ431[33] that removes genes rightward from ninB in prophage
a All B. subtilis strains (name starting by BSB and TR) are derived from BSB1 which is a tryptophan-prototrophic (trp+) of B. subtilis 168 [34] excepted TF8A derivative strains. All Salmonella strains