The purification and properties of penicillin beta-lactamases mediated by transmissible R factors in Escherichia coli.

Ampicillin Cephaloridine Chromatography Cloxacillin Electrophoresis Escherichia coli/enzymology Genetics, Microbial Hydrogen-Ion Concentration Kinetics Penicillin G Penicillin Resistance Penicillin V/analogs & derivatives Penicillinase/isolation & purification Temperature Time Factors Ultracentrifugation beta-Lactamase Inhibitors

beta-Lactamase Inhibitors Ampicillin Penicillinase Cephaloridine Cloxacillin Penicillin G Penicillin V