Mutation 。Nonsense mutation Results in a nonsense codon DNA(coding strand) TACUUCAAACC AUU TA CAU CA AACC GAU D Transcription 风a.ohcooc.&eoA囚 Aod风风o0 aedech mRNA Met Stop Translation (c)Nonsense mutation Amino acid sequence Phe Gly Stop (a)Normal DNA molecule Figure 8.17a,c• Nonsense mutation Mutation • Results in a nonsense codon Figure 8.17a, c