Synonyms : AER-I beta-Lactamase, Benzylpenicillinase, Carbenicillinase, Exopenicillinase, beta Lactamase III, beta Lactamase RP4, gamma-Penicillinase, AER I beta Lactamase, Lactamase III, beta, Lactamase RP4, beta, beta Lactamase I, beta-Lactamase, AER-I, gamma Penicillinase