CCAR2 and Parkinson disease: PD risk and scRNA eQTL signals for DA neurons also intersected with other independent PD risk loci including TBC1D5, PRCP, CCAR2, ARIH2, and CCDC58. In these genes, the PD risk variant appears to be more statistically significantly associated with expression in DA neurons when compared with other cell types detected in the FOUNDIN-PD resource.