title: The interplay of beta-lactamases and intrinsic factors in the resistance of gram-negative bacteria to penicillins and cephalosporins.
mesh_terms: D001419:Bacteria / Q000166:cytology / Q000187:drug effects* / Q000201:enzymology; D002462:Cell Membrane / Q000378:metabolism; D002511:Cephalosporins / Q000378:metabolism / Q000494:pharmacology*; D005111:Extrachromosomal Inheritance; D008826:Microbial Sensitivity Tests; D009154:Mutation; D010403:Penicillin Resistance; D010405:Penicillinase / Q000502:physiology*; D010406:Penicillins / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D002511:Cephalosporins; D010406:Penicillins; D010405:Penicillinase