Plasmid and uses thereof

摘要

Plasmids carrying one or more genes which confer phage insensitivity upon Streptococcus lactis or Streptococcus lactis subsp. diacetylactis as well as Streptococcus cremoris bacteria in which the insensitivity is not destroyed at temperatures of up to 40 DEG C. are described. DNA fragments are also described which encode phage insensitivity. Such plasmids and DNA fragments are suitable for conferring phage insensitivity upon bacteria or food starter cultures containing bacteria.