Fig. 1From: Novel intragenic deletion within the FXN gene in a patient with typical phenotype of Friedreich ataxia: may be more prevalent than we think?Pedigree and genetic analysis of the FXN polymorphic region performed on the proband and his family. The results of PCR fragment analysis show an allele of 7 GAA repeats in the father’s sample (II-3) and an allele of 9 GAA repeats in the mother’s sample (II-4). The sibling (III-1) presents two normal alleles of 7 and 9 GAA repeats, respectively. No peaks were observed in the proband’s sample (III-2). To detect expanded alleles, TP-PCR was performed and, as a result, the father (II-3) and the proband’s (III-2) samples showed an expansion while non-expanded alleles were observed in the mother’s sample (II-4). The affected individuals are marked in blackBack to article page