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Can't You Just Use a Label Maker?

The new edition of Cold Spring Harbor Protocols offers a couple of free-access methods. One protocol describes growing cells in a particular medium that marks the cells with nitrogen-15 so that they can be distinguished from other cells by mass spec. Another protocol describes how to tag DNA probes with visibly different fluorescent markers.

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.