News of the WeekBiochemistry

What Poison? Bacterium Uses Arsenic to Build DNA and Other Molecules

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Science  03 Dec 2010:
Vol. 330, Issue 6009, pp. 1302
DOI: 10.1126/science.330.6009.1302
Search for unusual life.

Felisa Wolfe-Simon collects samples from Mono Lake (left), where high arsenic levels proved conducive to the evolution of arsenic-using microbes.

CREDITS: HENRY BORTMAN