Glutathione production in the PD SNc is likely hindered by a substantial reduction in γ‐glutamylcysteine synthetase activity, responsible for the de novo synthesis of glutathione (Kang et al., 1999), which has been linked to mutations in the DJ‐1 gene, or abnormal posttranslational modifications of DJ‐1 protein, in familial and sporadic PD (Zhou & Freed, 2005). Here, PARK7 is linked to Parkinson disease.