Fig. 1: The relationship of rs79727797 to the CAGGCC hexanucleotide short tandem repeat in TCERG1.
From: Huntington’s disease age at motor onset is modified by the tandem hexamer repeat in TCERG1

a The sequence of the tandem repeat region in exon 4 of TCERG1 (orange). The blue polygon bounds quasi-tandem repeat (QTR) the central part of which contains pure repeat, CAGGCC hexanucleotide short tandem repeat (STR). b The TCERG1 protein domains and location of the repeat tract. c The variant alleles seen at the tandem repeat locus arranged in descending order of prevalence.