Out of the six gene mutations responsible for monogenic PD, two are accountable for autosomal dominant (AD) PD forms (SNCA and LRRK2) and the remaining four for autosomal recessive (AR) PD (PARK2, PINK1, DJ-1, and ATP13A2) (Klein and Westenberger, 2012). The gene discussed is PINK1; the disease is Parkinson disease.