Specific fragmentation of mitochondrial DNA from Neurospora crassa by restriction endonuclease Eco R I. |
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Authors: | U Bernard E Bade H Küntzel |
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Institution: | Max-Planck-Institut für experimentelle Medizin, Abteilung Chemie, and Institut für Mikrobiologie, Abteilung Molekulare Genetik, GSF, 34 Göttingen, Germany |
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Abstract: | Linear, size-heterogenous mitochondrial DNA from was cleaved by the restriction endonuclease Eco R I into eleven specific fragments. According to their contour lengths the fragments have molecular weights between 1.1 and 14 × 106. The sum of the fragments lengths is identical with the contour length (19.8 μm, 41 × 106 daltons) of the few circular molecules detectable in purified DNA preparations.The results suggest sequence homogeneity of mitochondrial DNA and further demonstrate that restriction enzymes can be used to establish a physical map of an unspecifically-fragmented DNA molecule. |
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