David D. Perkins, a Stanford geneticist who continued the work of George Beadle and Edward Tatum on Neurospora -- which Beadle and Tatum used to illustrate their "one gene, one enzyme" hypothesis, earning them a Nobel Prize -- died of pneumonia early last month at the age of 87. Dorothy "Dot" Newmeyer Perkins, David's wife and laboratory collaborator, died of natural causes four days later, at the age of 84. As the microbiology community moved toward using E. coli as a model organism in the 1950s, David Perkins "maintained his love of Neurospora" and continued to promote it as a useful model, David Jacobson, a senior scientist in Perkins' lab, told The Scientist. "David's work and sense of community spirit kept research on Neurospora alive," Jacobson said. "He stands out for his lifetime achievements, the long-term contributions to the field of genetics." David Perkins earned a PhD...

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