Interestingly, three members of the metallothionein family, MT1X (logFC: −1.55422) MT2A (logFC: −1.38683), and MT1F (logFC: −1.32454) that are involved in copper dyshomeostasis and alpha-synuclein aggregation [26] were significantly downregulated in PD NPCs. The gene discussed is MT1X; the disease is Parkinson disease.