Repeat unit AAA--/--TTT repeats 21 times in the reference sequence.
...CCCAGATACTCAGGAGGCTGAGGCAGGAAAATTGCTTGAAACTGGGAGGCGAAGGTTGCAGTGAACCCAGATCGCGCCATTGCACTCCAGCCTGGGCAAC
AAGAGTGAAACTCTGTCTCAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAAAATAATAAAATAAAA
TAAAATAAAATAAAATAAAATAAAAATGAACAAAATGAAAAGGGGGATACTAAGAATGGAAGTATTATTTCAGAGAAGGATAAGGATAGAAGGCTTTATT
CTTGTCTGGGGCTCAAGACTGGACCAATGGCTGCACAACTTTAGA...