The genes associated to familial forms of PD mediate autosomal dominant or recessive forms and include α-syn (SNCA, also known as PARK1), Ubiquitin C-terminal hydrolase L1 (UCH-L1, also known as PARK5), Leucine-rich repetition kinase 2 (LRRK2, also known as PARK8), Parkin (PARKIN, also known as PARK2), DJ-1 (also known as PARK7), and PTEN-induced kinase 1 (PINK1, also known as PARK6). Here, LRRK2 is linked to Parkinson disease.