title: Escherichia coli mutants deficient in exoribonucleases.
mesh_terms: D004926:Escherichia coli / Q000187:drug effects / Q000201:enzymology*; D007700:Kinetics; D009154:Mutation; D009604:Nitrosoguanidines / Q000494:pharmacology; D012260:Ribonucleases / Q000172:deficiency* / Q000378:metabolism
chemical_list: D009604:Nitrosoguanidines; D012260:Ribonucleases