Opko Health this week announced the launch of its 4Kscore prostate cancer test, which it will offer out of its Nashville, Tenn.-based CLIA lab.

Intended to aid clinicians in deciding if a prostate cancer is high risk and requires biopsy, the 4Kscore test analyzes four kallikrein protein markers – total prostate specific antigen, free PSA, intact PSA, and hK2 – combined with patient age and digital rectal exam status to determine the likelihood of aggressive disease.

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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.