title: Penicillin and the site of wall growth in gram-negative bacilli.
mesh_terms: D001419:Bacteria / Q000187:drug effects; D002473:Cell Wall / Q000187:drug effects; D004926:Escherichia coli / Q000187:drug effects* / Q000254:growth & development; D008855:Microscopy, Electron, Scanning; D009994:Osmolar Concentration; D010406:Penicillins / Q000494:pharmacology*; D013104:Spheroplasts / Q000187:drug effects
chemical_list: D010406:Penicillins