title: On codon usage.
mesh_terms: D003062:Codon; D003090:Coliphages / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005815:Genetic Code; D007763:Lac Operon; D012333:RNA, Messenger; D012097:Repressor Proteins / Q000235:genetics
chemical_list: D003062:Codon; D012333:RNA, Messenger; D012097:Repressor Proteins