DNA isolated from a small sample of saliva or blood can yield information, fairly inexpensively, about a person's relative risk of developing dozens of diseases or medical conditions.
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Volunteer Greg Ruegsegger is outfitted with monitors, a catheter threaded into a vein and a mask to capture his breath in an experiment run by Joyner to measure human performance.
Sequencing the genes of a cancer cell turns up lots of genetic mutations — but some of them are harmless. The goal is to figure out which mutations are the troublemakers.
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Biologist Rob Knight, co-founder of the American Gut Project, recently moved the project to the University of California, San Diego's School of Medicine.
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