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Characteristics of repeat regions from HTT and AR mRNAs. (A and C) Schematic representation of HTT and AR mRNA fragments. White bars, specific flanking sequences; blue bars, polymorphic CAG repeats; red bar, polymorphic CCG repeat region; dark blue bar, monomorphic (CAG)6 tract; green bar, monomorphic (CUG)3 sequence. Genotyping of CAG and CCG repeat tracts in the HTT gene (B) and the polymorphic CAG tract from the AR gene (D).
