iGenetics 3rd Edition by Peter Russell

تمرين 5

The amino acid sequence shown in the following table was obtained from the central region of a particular polypeptide chain in the wild-type and several mutant bacterial strains:
For each mutant, say what change has occurred at the DNA level, whether the change is a base-pair substitution mutation (transversion or transition, missense or nonsense) or a frameshift mutation, and in which codon the mutation occurred. (Refer to the codon dictionary in Figure, p. 108.)Figure
The genetic code. Of the 64 codons, 61 specify one of the 20 amino acids. The other 3 codons are chain-terminating codons and do not specify any amino acid. AUG , one of the 61 codons that specify an amino acid, is used in the initiation of protein synthesis.