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This Week in PNAS: Jul 18, 2007

Two open access papers published this week in PNAS score for systems biology. Neuroscientists at Yale, Harvard, and the Burnham Institute report that when they implanted undifferentiated human neural stem cells into primates made to show symptoms of Parkinson's disease, some of these cells improved behavior and increased dopamine levels.

In another article, Joe Ecker at The Salk Institute collaborated with researchers at the University of Chicago to find genome-wide patterns of single-feature polymorphisms in Arabidopsis thaliana. They hybridized 23 wild strains of the plant to the ATH1 gene expression array and found 77,420 single-feature polymorphisms with distinct patterns of variation across the genome.

The Scan

Fertility Fraud Found

Consumer genetic testing has uncovered cases of fertility fraud that are leading to lawsuits, according to USA Today.

Ties Between Vigorous Exercise, ALS in Genetically At-Risk People

Regular strenuous exercise could contribute to motor neuron disease development among those already at genetic risk, Sky News reports.

Test Warning

The Guardian writes that the US regulators have warned against using a rapid COVID-19 test that is a key part of mass testing in the UK.

Science Papers Examine Feedback Mechanism Affecting Xist, Continuous Health Monitoring for Precision Medicine

In Science this week: analysis of cis confinement of the X-inactive specific transcript, and more.