Helium-neon laser irradiation of rat liver mitochondria gives rise to a new subpopulation of mitochondria isolation and first biochemical characterization
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(0) (0 Votes)Views: (1041) Date: (20-01-09) Pages: () -
Author: Greco M Perlino E Pastore D Guida G Marra E Quagliariello E.
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Abstract: Helium-neon laser irradiation of rat liver mitochondria gives rise to a new subpopulation of mitochondria: isolation and first biochemical characterization. G reco M, Perlino E, Pastore D, Guida G, Marra E, Quagliariello E. Centro di Studio sui Mitocondri e Metabolismo Energetico CNR, Bari, Italy. An experiment was performed to isolate the small atypical mitochondria produced during the irradiation of normal mitochondria with an He-Ne laser. Rat liver mitochondria were irradiated with a low-power continuous-wave He-Ne laser (energy dose, 5 J cm-2), followed by isolation using a sucrose gradient. In the irradiated sample, two bands were observed, one corresponding to normal mitochondria and the other to atypical mitochondria. Certain biochemical features of the mitochondria were investigated: mitochondrial enzyme activity and the presence of DNA and RNA were demonstrated. Hybridization experiments carried out with labelled mitochondrial probes, containing the genes for cytochrome oxidase subunit I and 12S rRNA, confirmed the mitochondrial nature of the isolated RNA. PMID: 1720171 [PubMed - indexed for MEDLINE]
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