title: R-factor gene expression gram-negative bacteria.
mesh_terms: D001681:Biological Assay; D004352:Drug Resistance, Microbial; D004754:Enterobacter / Q000201:enzymology; D004755:Enterobacteriaceae; D004926:Escherichia coli / Q000201:enzymology; D005827:Genetics, Microbial; D010405:Penicillinase / Q000032:analysis; D011511:Proteus / Q000201:enzymology; D012706:Serratia marcescens / Q000201:enzymology; D014170:Transformation, Genetic
chemical_list: D010405:Penicillinase