title: Salmonella typhimurium LT2 strains which are r- m+ for all three chromosomally located systems of DNA restriction and modification.
abstract: We describe the derivation of two strains of Salmonella typhimurium LT2 which are r- m+ for all three of the known chromosomal genes for the restriction and modification of DNA, hsdLT, hsdSA, and hsdSB; the strains were designated LB5000 and LB5010. LB5000 is a smooth derivative sensitive to phage P22; LB5010 is a galE strain sensitive to phage P1.
mesh_terms: D004269:DNA, Bacterial / Q000378:metabolism*; D005798:Genes, Bacterial; D009154:Mutation; D012483:Salmonella Phages / Q000254:growth & development; D012486:Salmonella typhimurium / Q000235:genetics* / Q000378:metabolism
chemical_list: D004269:DNA, Bacterial