Mutations in the glucocerebrosidase 1 (GBA1) gene, encoding β‐glucocerebrosidase (GCase), are the most common genetic risk factor for Parkinson's disease (PD) and other synucleinopathies (Salman et al., 2021; Sidransky et al., 2009). The gene discussed is GBA1; the disease is Parkinson disease.