title: The beta-lactamases of gram-negative bacteria and their possible physiological role.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001419:Bacteria / Q000187:drug effects / Q000201:enzymology*; D001439:Bacteroides / Q000201:enzymology; D005075:Biological Evolution; D002511:Cephalosporins / Q000378:metabolism / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D004790:Enzyme Induction; D005796:Genes; D008722:Methods; D009161:Mycobacterium / Q000201:enzymology; D010403:Penicillin Resistance; D010405:Penicillinase / Q000032:analysis / Q000096:biosynthesis / Q000145:classification / Q000302:isolation & purification / Q000378:metabolism; D010406:Penicillins / Q000378:metabolism / Q000494:pharmacology; D013045:Species Specificity
chemical_list: D000596:Amino Acids; D002511:Cephalosporins; D010406:Penicillins; D010405:Penicillinase