title: Measuring adaptation within the genetic code.
authors.forename: S J
authors.initials: SJ
authors.lastname: Freeland
authors.forename: R D
authors.initials: RD
authors.lastname: Knight
authors.forename: L F
authors.initials: LF
authors.lastname: Landweber
mesh_terms: D000596:Amino Acids / Q000235:genetics; D005815:Genetic Code; D008957:Models, Genetic; D016011:Normal Distribution; D012641:Selection, Genetic
chemical_list: D000596:Amino Acids