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Efficient mitochondrial function requires physical interactions between the proteins encoded by the mitochondrial and nuclear genomes. Coevolution between these genomes may result in the accumulation of incompatibilities between divergent lineages. We test whether mitochondrial–nuclear incompatibilities have accumulated within the Drosophila melanogaster species subgroup by combining divergent mitochondrial...
To gain insight on mitochondrial DNA (mtDNA) evolution, we assembled and analyzed the mitochondrial genomes of Drosophila erecta, D. ananassae, D. persimilis,D. willistoni, D. mojavensis, D. virilis and D. grimshawi together with the sequenced mtDNAs of the melanogaster subgroup. Genomic comparisons across the well-defined Drosophila phylogeny impart power for detecting conserved mtDNA regions that...
The authors review the latest fatigue and aging data on ferroelectric memory products and discuss thermal characteristics which limit the nonvolatile data retention storage temperature. They evaluate the effects of thermal excursions on the remanent polarization level in polycrystalline films. An excursion to an elevated temperature has been found to cause a reduction in retained polarization. The...
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