The conversion of amber suppressors to ochre suppressors.
D003090:Coliphages; D004926:Escherichia coli; D005815:Genetic Code; D005827:Genetics, Microbial; D009154:Mutation; D012343:RNA, Transfer; D013489:Suppression, Genetic; D014161:Transduction, Genetic; D014316:Tritium; D014498:Uracil
D014316:Tritium; D014498:Uracil; D012343:RNA, Transfer