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This is Scientific American 60-Second Science. I'm Christopher Intagliata. Got a minute?

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Body odor. The smell of B. O. is unmistakable.

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And the culprit behind that signature stench is a molecule called thioalcohol.

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Our noses are so attuned to it, we can pick up quantities as small as one part per trillion.

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But here's the mystery: How does that stinky substance get there in the first place?

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Well, it turns out bacteria named Staphylococcus hominis is the major perpetrator, along with a few of its relatives.

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Their genes code for enzymes that snip the molecules in our sweat to pieces, creating the offensive thioalcohols, along with bits of food for the bacteria.

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Because, Hey, bacteria gotta eat, too.

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When innocuous E.coli bacteria were given the genes that our B.O.perpetrators have naturally, they, too, could achieve the stank.

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These findings were presented at the annual meeting of the Society for General Microbiology, in Birmingham, in the U.K.

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Not surprisingly, this work was partially funded by Unilever.

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Because now that we've identified these microbial targets, the researchers say, it might be possible to design more effective deodorants.

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Which, instead of crippling all underarm bacteria, dispatch only the most dastardly denizens.

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Smells like profit to me.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Christopher Intagliata.

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