Medical Genetics Parkinsonism Parkinsonism Cyt b Dystonia ND6 MELAS→ L ND5 ND1 Human mtDNA (16.6kb) L2 ND2 Dystonia Ataxia -d ND4L/ND4 G Chorea S1 D cco ND3 ccoⅢ MND CCO ll+ A8/A6 MERRFMedical Genetics