ATP13A2 and Parkinson disease: To date, in addition to α-synuclein (SNCA), parkin (PARK2), UCH-L1 (PARK5), PINK1 (PARK6), DJ-1 (PARK7), LRRK2 (PARK8), and ATP13A2 (PARK9), there are also GBA, VPS35, EIF4G1, PARK16 which have been isolated to be responsible for PD based on family based linkage analysis.