Repeat unit CAG/CTG repeats 19 times in the reference sequence.
...ATCATTGTAGTGAGTGGCGGCCCTGGGACTGATAGCAAGGACAGTGGTGAGCTCAGTTCACTCCCACTGGGCCCAACAACACTGGACACCCGGCCACTGC
AGTCTTCTGCCCTGCTGGACAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAGCAACAGTAACAGCAGCAGTTCGTCCGGACCCAACCCTTCTAC
CTCCTTTGAGCCCATCAAGGCAGACCCCACAGGTGGTGAGTACCTGCCCCCTGGGGGCAGAGAGAGAGAGTCTAGCCTCAGTCCAGTCCTAGGTCA...