Some instances of PD have been linked to mutations in genes, such as leucine-rich repeat kinase 2 (LRRK2), ubiquitin C-terminal hydrolase L1 (UCHL1), Daisuke-Junko-1 (DJ-1), glucocerebrosidase (GBA1), and phosphatase and tensin homolog (PTEN)-induced kinase 1 (PINK1) [5,6]. The gene discussed is UCHL1; the disease is Parkinson disease.