title: Porin-mediated cephalosporin resistance in Escherichia coli K-12.
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000235:genetics*; D002511:Cephalosporins / Q000494:pharmacology*; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects* / Q000235:genetics; D009154:Mutation
chemical_list: D001425:Bacterial Outer Membrane Proteins; D002511:Cephalosporins