Mitochondria: New functions of mitochondrial fusion uncovered

A typical human cell contains hundreds of mitochondria -- energy-producing organelles -- that continually fuse and divide. Relatively little is known, however, about why mitochondria undergo this behavior. Now, scientists have taken steps toward a fuller understanding of this process by revealing just what happens to the organelle, its DNA (mtDNA), and its energy-producing ability when mitochondrial fusion fails.

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