title: Scientists expand the genetic code.
abstract: A bacterium has been created that synthesizes an unnatural amino acid and incorporates it into proteins with a fidelity and efficiency that rivals that of the 20 natural amino acids.
authors.forename: Vida
authors.initials: V
authors.lastname: Foubister
mesh_terms: D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D029968:Escherichia coli Proteins / Q000096:biosynthesis; D005815:Genetic Code; D030781:Organisms, Genetically Modified; D010649:Phenylalanine / Q000031:analogs & derivatives* / Q000096:biosynthesis
chemical_list: D029968:Escherichia coli Proteins; C009722:4-aminophenylalanine; D010649:Phenylalanine