This Week in Cell

In a paper published online in advance in Cell this week, investigators at the University of Vienna and the Hebrew University-Hadassah Medical School show that the toxin MazF "cleaves at ACA sites at or closely upstream of the AUG start codon of some specific mRNAs and thereby generates leaderless mRNAs." The team also reports on a subpopulation of ribosomes that it says "selectively translates the described leaderless mRNAs both in vivo and in vitro."

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CNN reports that researchers have tied a new variant to opioid addiction risk.

Organoids derived from patients' tumors may help determine what chemotherapy treatment patients would benefit from, according to New Scientist.

An initiative from GenomeAsia 100K hopes to increase the number of South Asians in genetic research, according to NBC News.

In Science this week: genomic analysis of ancient and modern horses indicates population turnover, and more.