Penicillins and cephalosporins.
D001665:Binding Sites; D002511:Cephalosporins; D055598:Chemical Phenomena; D002621:Chemistry; D003429:Cross Reactions; D007106:Immune Sera; D009682:Magnetic Resonance Spectroscopy; D010405:Penicillinase; D010406:Penicillins; D013329:Structure-Activity Relationship
D002511:Cephalosporins; D007106:Immune Sera; D010406:Penicillins; D010405:Penicillinase