Researchers led by Johns Hopkins' Nickolas Papadopoulos found that different versions of the mitochondrial genome can be found in different organs in the same person. As they report in Nature, the researchers used next-gen DNA sequencing, and were able to find single-letter DNA changes that occur in as few as one in 10,000 mitochondria.

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The UK's Human Fertility and Embryology Authority calls for consumer genetic testing companies to warn customers that testing could uncover family secrets, according to the Guardian.

The New York Times reports that United Nations delegates have been discussing how to govern the genetic resources of the deep sea.

Researchers have transplanted edited cells into mice that appear to combat cocaine addiction, New Scientist reports.

In PNAS this week: analysis of proteolytic enzymes secreted by circulating tumor cells, phylogenetic study of Fv1 evolution, and more.