title: Antibodies blocking neutralization of penicillinase by the homologous antiserum.
mesh_terms: D000906:Antibodies; D007106:Immune Sera / Q000737:chemistry*; D010405:Penicillinase / Q000737:chemistry*
chemical_list: D000906:Antibodies; D007106:Immune Sera; D010405:Penicillinase
keywords: ANTIBODIES; IMMUNE SERUMS/chemistry; PENICILLINASE/chemistry