LRRK2 and hereditary disease: Many of the genes identified, including CYP2D6, LRRK2, MAPT, NR4A2, PARK2, PARK3, PARK7, PINK1, UCHL1 (Figure 6), are associated with Parkinson's disorders in genetic disorder reference databases, such as OMIM, GHR, GAD, and MutPD.