Repeat unit A/T repeats 21 times in the reference sequence.
...TTAGAAAATGACCTATAGATTCAGTGCAGTTTTAATCAAAATGCCAAGAGGTTTTTGATTAAAGAAGATGATTCTAAAATCTTCATGCAAATATAAAGGG
CAGAGATTATCTTTTTCAATTTTTTTTTTTTTTTTTTTTTGAGATAGCTTCTTGCTCTGTCACCCATGCTGGAGTGCAGTGGTGTAATCTTGGCTCACTG
CAACCTCTGCCTCCTGGGCTCAGGCGATCCTTTGGCCTCAGCCCCCTCATATAGCTGGGA...