Other genes found to be associated with isolated or combined dystonia include ANO3 (DYT24), TUBB4A (DYT4), GCH1 (DYT5a), TH (DYT5b), TAF1 (DYT3), PRKRA (DYT16), ATP1A3 (DYT12), SGCE (DYT11), KCTD17, and CACNA1A [4–8]. This evidence concerns the gene GCH1 and Dystonia.