In addition, mutations in ZNT2/SLC30A2 result in transient neonatal zinc deficiency (TNZD) in breastfeeding infants of affected mothers11–13, whereas ZNT10/SLC30A10 mutations cause Parkinsonism and dystonia with hypermagnesemia, polycythaemia, and hepatic cirrhosis14,15. The gene discussed is SLC30A10; the disease is Parkinson disease.