Aframeshift mutation caused by the insertion of a nucleotide in themRNA with the sequence 5' CAT CAT CAT CAT CAT CAT CAT CAT CATproduces an inactive protein. A second frameshift, caused by thedeletion of a second nucleotide at some position downstream of thenucleotide insertion, restores the protein function. If therestored protein product contains four amino acids residues thatdiffer from the wild-type protein, what are the maximum and minimumnumber of nucleotides between the two point mutations?
