TAF1 and X-linked dystonia-parkinsonism: Although, it is difficult to demonstrate the functional consequences of these variants in the disease, a ~ 2.6-kb SINE-VNTR-Alu-CCCTCT (SVA)-type retrotransposon (Hancks and Kazazian Jr., 2010) in intron 32 of TAF1 (Makino et al., 2007) has a variable number of hexameric repeats (Westenberger et al., 2019) among XDP patients.