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Gold-digging bacterium makes precious particles

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Biochemical trick could aid in recovery of the metal from waste. Gold prospectors may one day use Petri dishes to help with their quests. A species of bacterium forms nanoscale gold nuggets to help it to grow in toxic solutions of the precious metal, reports a paper published online today in Nature Chemical Biology.

The molecule with which the bacteria create the particles could one day be used to collect gold from mine waste, says Frank Reith, an environmental microbiologist at the University of Adelaide in Australia, who works on gold-processing bacteria but was not involved in the latest study.

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