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How carbon changes near volcanic chains.  (University of New Mexico)
Costa Rica: Cycle of Carbon

Natural Carbon Capturing by Microbes

Two years ago a team of scientists visited Costa Rica’s subduction zone, where the ocean floor sinks beneath the continent and volcanoes tower above the surface. They wanted to find out if microbes can affect the cycle of carbon moving from Earth’s surface into the deep interior. According to their new study in Nature, the answer is affirmatively - yes they can.

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Artistic depiction of human mitochondrial ribonuclease P. A rendering of the three-dimensional model of mtRNase P is depicted in the foreground with protein subunits in grey and RNA in red, and the typical cristae-structure of mitochondrial membranes and associated protein complexes are depicted in the background. (Arjun Bhatta / Max Planck Institute for Biophysical Chemistry)
Germany: Molecular Biology

First High-Resolution Glimpse of the Powerhouse of Human Cells

Scientists at the Max Planck Institute (MPI) for Biophysical Chemistry and the University Medical Center Göttingen (UMG) have determined the molecular mechanism of the first step of RNA processing in human mitochondria. This step is carried out by an enzyme complex called mitochondrial ribonuclease P (mtRNase P). The scientists visualized the structure of this molecular RNA cutting machine using cryo-electron microscopy (cryo-EM). This reveals for the first time how mitochondrial RNAs are cut, and explains why mutations in the involved proteins lead to disease in humans.

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