Fig. 1: Somatic expansions in HTT alleles by CAG length.

The ratio of CAG expansions (number of somatic expansion sequenced reads/number of inherited allele sequenced reads) relative to the number of CAGs from the inherited allele in peripheral blood is depicted for (a) allele sizes ranging from 10 to 66 CAGs (n = 337), and (b) a closer view for allele sizes ranging from 10 to 40 CAGs.