title: Whither directed mutation?
authors.forename: P L
authors.initials: PL
authors.lastname: Foster
mesh_terms: D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D007763:Lac Operon; D007785:Lactose / Q000378:metabolism; D009154:Mutation; D010641:Phenotype
chemical_list: D007785:Lactose