This Week in PNAS

A National Human Genome Research Institute-led team considers sequence variations in clonal fibroblast cell lines and induced pluripotent stem cells generated from skin fibroblast cultures. The researchers used a combination of exome sequencing and SNP genotyping to identify variant differences between fibroblast subclones and induced pluripotent stem cell lines compared to those found in the fibroblast populations used to produce them.

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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.