This Week in PNAS

Using the 18S ribosomal DNA gene as a barcode when looking at environmental samples may miss some members of the communities being tested, according to a study in the early, online edition of the Proceedings of the National Academy of Sciences this week by researchers based in the UK, Italy, Germany, and the US. In particular, authors of the study argue that the 18S marker underestimates the diversity of so-called meiofauna — microscopic invertebrate animals.

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Researchers suggest that genetic variations could influence the side effects people experience when using synthetic cannabinoids, the International Business Times reports.

An analysis has examined the makeup of researchers on Twitter and what they share, Nature News reports.

At Stat News, Jim Kozubek argues that the Broad Institute is pushing the boundary of what a nonprofit is.

In PNAS this week: gut microbes may affect honeybee weight, phenotype and gene expression changes in DiGeorge syndrome, and more.