Researchers from Isis Pharmaceuticals this week reported in vitro evidence on the existence of a new class of siRNA, which can promote target RNA reduction independent of both Argonaute and RISC.

The authors of the study, which appeared in Nucleic Acids Research, caution that much work remains to be done before the significance of these siRNAs can be established, however.

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

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

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

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