Fig. 2From: GCH1 variants contribute to the risk and earlier age-at-onset of Parkinson’s disease: a two-cohort case-control studySchematics of GCH1 and its triphosphate cyclohydrolase 1. Synonymous variants (green), previously reported variants associated with PD or DRD (red), newly described variants with predicted damaging functional alterations (blue) and variants with predicted tolerable functional alterations (black)Back to article page