Who discovered mitochondrial DNA?
Mitochondrial DNA
{'answer_start': array([49]), 'answer_text': array(['Margit M. K. Nass and Sylvan Nass'], dtype=object)}
Mitochondrial DNA was discovered in the 1960s by Margit M. K. Nass and Sylvan Nass by electron microscopy as DNase-sensitive threads inside mitochondria,[97] and by Ellen Haslbrunner, Hans Tuppy and Gottfried Schatz by biochemical assays on highly purified mitochondrial fractions.[98]