title: Adaptive mutation of a lacZ amber allele.
authors.forename: P L
authors.initials: PL
authors.lastname: Foster
authors.forename: J
authors.initials: J
authors.lastname: Cairns
mesh_terms: D000483:Alleles; D004926:Escherichia coli / Q000235:genetics*; D015964:Gene Expression Regulation, Bacterial; D007763:Lac Operon; D009154:Mutation