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The DNA sequence shown below comes from part of the TP53 gene. It encodes the last amino acids of the p53 protein, which is normally 393 amino acids long. The underlined codon indicates the correct reading frame of this gene. The lower strand of the gene is used as the template during the transcription of mRNA from this gene. The 5 'T on the top strand indicates nucleotide position one.
. . TTCAAGACAGAAGGGCCTGACTCAGACTGACATTCTCC-3'
. . . AAGTTCTGTCTTCCCGGACTGAGTCTGACTGTAAGAGG 5
A mutation that changes the nucleotide at position 25 from to T results in which of the following:
. . TTCAAGACAGAAGGGCCTGACTCAGACTGACATTCTCC-3'