Janice Chen was jumping into an Uber, cramming in equipment the size of a microwave. At the time a PhD student at the University of California, Berkeley, Chen had been invited to a lab to look for the human papillomavirus in hospital medical samples using a new technique she had created.Soon enough, bingo. Her test, which uses the gene-editing tool CRISPR, was able to spot the virus nearly every time, offering a new way to test for germs. She and several other students, along with Jennifer Doudna, the co-discoverer of CRISPR, cofounded a company with plans to develop a new generation of testing instruments. They called it Mammoth Biosciences.
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