Also this year, the following proteins were found to have implications for sporadic Parkinson's disease: PARK2 (encodes parkin), PINK1 (encodes PTEN-inducing putative kinase 1), PARK7 (encodes DJ-1), SNCA (encodes alpha-synuclein), LRRK2 (encodes dardarin), and HTRA2 (encodes Omi/HTRA2) [51]. Here, LRRK2 is linked to Parkinson disease.