title: Isolation of rel mutants of Escherichia coli B/r.
abstract: A method that relies on the biological effect of near-UV (340-nm) irradiation is described by which large numbers of independent rel mutants of Escherichia coli B/r may be rapidly isolated.
mesh_terms: D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism / Q000528:radiation effects; D005798:Genes, Bacterial; D006150:Guanine Nucleotides / Q000378:metabolism*; D006159:Guanosine Tetraphosphate / Q000378:metabolism*; D009154:Mutation; D014466:Ultraviolet Rays
chemical_list: D006150:Guanine Nucleotides; D006159:Guanosine Tetraphosphate