Skin biopsies of 10 PD patients with different GBA1 mutations (six N370S, three E326K, one L444P) were analyzed by double-immunofluorescence labeling with anti-p-syn and anti-protein gene product 9.5 (PGP9.5, axonal marker) to detect intraaxonal p-syn deposition. The gene discussed is GBA1; the disease is Parkinson disease.