Mutations in both alleles of parkin have been shown to result in Parkinson disease (PD). However, it is unclear whether haploinsufficiency (presence of a mutation in only 1 of the 2 parkin alleles) increases the risk for PD.
Medical and Molecular Genetics, Indiana University, School of Medicine, Hereditary Genomics Division, 410 W. 10th St., MI-4000, Indianapolis, IN 46202, USA. tforoud@iupui.edu
