NALCN and channelopathy: Mutations in NALCN and its regulatory protein UNC80 are the causes of human diseases (Köroğlu et al. 2013; Al-Sayed et al. 2013; Perez et al. 2016; Stray-Pedersen et al. 2016; Fukai et al. 2016; Bramswig et al. 2018) that are collectively called NALCN channelopathies (Bramswig et al. 2018).