Comment on

• Mitochondrial DNA deletions are abundant and cause functional impairment in aged human substantia nigra neurons.

  Kraytsberg Y, Kudryavtseva E, McKee AC, Geula C, Kowall NW, Khrapko K. Kraytsberg Y, et al. Nat Genet. 2006 May;38(5):518-20. doi: 10.1038/ng1778. Epub 2006 Apr 9. Nat Genet. 2006. PMID: 16604072
• High levels of mitochondrial DNA deletions in substantia nigra neurons in aging and Parkinson disease.

  Bender A, Krishnan KJ, Morris CM, Taylor GA, Reeve AK, Perry RH, Jaros E, Hersheson JS, Betts J, Klopstock T, Taylor RW, Turnbull DM. Bender A, et al. Nat Genet. 2006 May;38(5):515-7. doi: 10.1038/ng1769. Epub 2006 Apr 9. Nat Genet. 2006. PMID: 16604074