CSNK2B and Okur-Chung neurodevelopmental syndrome: Recently, human neurological disorders were discovered where either CK2α (Okur-Chung neurodevelopmental syndrome, OCNDS) [60] or CK2β (Poirier-Bienvenu syndrome, POBINDS) [61] is mutated, going along with low-activity or dysfunctional CK2.