MicroRNA Drives Cells' Adaptation To Low-oxygen Living

Researchers have fresh insight into an evolutionarily ancient way that cells cope when oxygen levels decline. In studies of cells taken from the lining of human pulmonary arteries, they show that a microRNA -- a tiny bit of RNA that regulates the activity of particular genes and thus the availability of certain proteins -- allows cells to shift their metabolic gears, in a process known as the Pasteur effect.

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