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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360Dx reports that the US Centers for Medicare & Medicaid Services would cover next-generation sequencing-based cancer panel tests.

The Washington Post reports that a meteorologist is being considered as presidential science and technology advisor.

In PNAS this week: precision medicine strategy to screen for disease risk, genome evolution in Haemophilus influenzae, and more.

Researchers have developed a PCR-based assay to gauge whether manatees are present in waters.