SEARCH Articles Figures Tables Biosynthesis of the Penicillins Florey and the Penicillin Production Line Look up the names of both individual drugs and their drug groups to access full information Penicillin G Look up the names of both individual drugs and their drug groups to access full information Penicillins Penicillin Inhibits the Transpeptidation Reaction Role of the Side Chain in Penicillin Allergy Semi-Synthetic Penicillins and the Growing Problem of Resistance Structure of the penicillins The Discovery of Penicillin The biosynthesis of penicillins and cephalosporins The penicillinase-resistant penicillins are oxacillin, cloxacillin, dicloxacillin, methicillin, and nafcillin