Our study included ten iPSC lines—three healthy controls (two males aged 71 and 43 years and one female aged 66 years), three PD patients with an E326K-GBA1 mutation (all males aged 59, 63, and 65 years (the last one was homozygous for the mutation)), and four sporadic PD (sPD) patients. The gene discussed is GBA1; the disease is Parkinson disease.