Repeat unit AGC/GCT repeats 4 times in the reference sequence.
...CCTGCAGATGTCCCCATGGAGGTCGGGCCGCACTGTTCCTGAGCTGCGGTTCAGTAGAGCTGGGCCAGGCAACGTCCTGCCTTTGGGAGCTTGCCCTCTG
CTTGGGAGAGTTGAACAAACAGCAGCAGCAGAAGACTGTCCAGGGGCTCGTGGCCCCCGGAAACGAGGCCAGGTGATGTGGGGAGTGCCCGACGCTCAGA
GGGAGCCAGGGCAGGTGTTGGGACACAGCCCAGGGCCTGGGGCAGCTGGGT...