title: Isolation and properties of beta-lactamase-less mutants from clinically important gram-negative bacteria.
mesh_terms: D000581:Amidohydrolases / Q000032:analysis*; D002510:Cephalosporinase / Q000032:analysis*; D002511:Cephalosporins / Q000494:pharmacology; D004755:Enterobacteriaceae / Q000187:drug effects / Q000201:enzymology* / Q000302:isolation & purification; D007612:Kanamycin / Q000494:pharmacology; D008722:Methods; D009154:Mutation; D010403:Penicillin Resistance; D010405:Penicillinase / Q000032:analysis*; D010406:Penicillins / Q000494:pharmacology; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000201:enzymology* / Q000302:isolation & purification
chemical_list: D002511:Cephalosporins; D010406:Penicillins; D007612:Kanamycin; D000581:Amidohydrolases; D002510:Cephalosporinase; D010405:Penicillinase