This Week in PNAS

In the Early Edition of PNAS this week, investigators at the US Food and Drug Administration and their colleagues report that they've detected DNA from xenotropic murine leukemia virus-related virus in peripheral blood mononuclear cells in 32 of 37 individuals diagnosed with chronic fatigue syndrome. In a healthy control population of 44 individuals, the team only found MLV-like virus gag gene sequences in three.

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What happens to scientific papers when certain journals are no longer published? Some scientists are trying to make sure they don't disappear forever.

A study in Microbiome finds that heavy drinkers have an unhealthy mix of bacteria in their mouths.

Doctors and patients are still trying to figure out what role at-home genetic testing should play in healthcare, Newsweek says.

In Genome Research this week, mismatch repair deficiency in C. elegans, retracing transcriptions start site evolution in the human genome, and more.