title: Directed mutagenesis as a technique to study protein function: application to beta-lactamase.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D009154:Mutation; D010403:Penicillin Resistance; D013329:Structure-Activity Relationship; D001618:beta-Lactamases / Q000235:genetics* / Q000378:metabolism
chemical_list: D001618:beta-Lactamases