ATP13A2 and type 1 diabetes mellitus: The zinc transporter ZNT8 is a common autoantigen in type 1 diabetes (Arvan et al. 2012), for example, and ATP13A2 (PARK9), a Parkinson’s disease gene, has been implicated in zinc homeostasis (Kong et al. 2014; Park et al. 2014; Tsunemi and Krainc 2014).