[On the relation of penicillinase to penicillin-resistance in E. coli].
D004926:Escherichia coli / Q000494:pharmacology*; D010403:Penicillin Resistance; D010405:Penicillinase / Q000737:chemistry*; D010406:Penicillins / Q000494:pharmacology*
D010406:Penicillins; D010405:Penicillinase
ESCHERICHIA COLI/pharmacology; PENICILLIN/pharmacology; PENICILLINASE/chemistry