Repeat unit GGA/TCC repeats 4 times in the reference sequence.
...CAGGGGCCTGGAGTCCAGCCTGGGAGTTAGTAGACAATCGTGTGGAAGAGGGACAGCTCTGTGGATTCCAGCCTTTAGCAGCCAGATTCCTCCCTGCGAG
GCTGGGGACGTTGGCCCTGGGAGGAGGAGGACTGCCTGGGCCCGCCCCTCCTAGGAGTTCCTGTGCCTGCTGGCACAAATTATCACCAGCGAGGGGCTAG
CCCAGTAGCAGCCCCCGGTCCCGTCACAGTTCTGGAGACTGGAAGCCTGAA...