title: New type of restriction to the expression of a structural gene in bacteria.
mesh_terms: D003593:Cytoplasm; D004171:Diploidy; D005796:Genes; D010405:Penicillinase / Q000096:biosynthesis*; D010641:Phenotype; D013210:Staphylococcus / Q000201:enzymology*
chemical_list: D010405:Penicillinase