This Week in PNAS

In the current issue of PNAS, plant biologists show that SET7, a known histone methyltransferase, is involved in regulating the stability of DNA methyltransferase (DNMT1), which has a role in regulating cytosine DNA methylation in mammalian cells. SET7 interacts with DNMT1, they found, and overexpression of SET7 leads to decreased DNMT1 levels, while knockdown of SET7 stabilizes DNMT1.

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Technology Review reports that researchers in the US have used CRISPR to modify a number of human embryos.

By introducing genes from butterfly peas and Canterbury bells, researchers in Japan have developed a blue chrysanthemum, according to NPR.

Plant researchers plan to sequence some 10,000 samples that represent the major plant clades, ScienceInsider reports.

In Nature this week: a Danish reference genome, and more.