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A comment on Microbes use arsenic in their DNA: Proves phosphorus is not required for life. Parent comment

Re:Microbes use arsenic in their DNA: Proves phosphorus is ... by dnautics on Thursday December 02, 2010 @06:53PM (#1964194)
..based on their MS measurements. They can't accurately calculate for impurities that might be in the source medium, there's no negative control on that.
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