Repeat unit AT/AT repeats 21 times in the reference sequence.
...AGGCAACAGAGTGAAATAGTGTCTTAAAAAAAAAGAATATGTAATTTGTTGATGGATATTTGGGTTGTTTACTGTTTTTGGCAATAATAAATAAAGCTGT
GATGAACATTTTCATACAAATATATATATATATATACATATATATACACAAATATATATATACACACACATTTTAATTTATCCTAAAACTTTTCTAGGAG
AAGCATGACTGGATCATCTAGTAGGGGCATATTTAAAATAGGATTTTGAAGCAAAACAATCAATAGTCTTCTCAGCCAGGTT...