Repeat unit GCA/TGC repeats 16 times in the reference sequence.
...GCGGGCGAAAGGGGCGGGCCGTCGGCGAGCGCTGAAGGTCTCTAGCCCTCCCCTGCGCTTTAGCCTCAGTGCGGAGCCTTAGGCGGAGCGAAGAGAACCG
GTCGCGGCAATCCTAGCGCGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCACCCGCATCCGCTGCGGGAGTCCGAGCCGGAACC
ACACCCAAGTAGCTGCCCTTTCCTCTTCTGTCATCTCACCGCCCCACCACAGACCGCGTTCCCCGAGGAAACCGGCCGCCCACGCCC...