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REC



Posts: 556
Joined: Sep. 2006

(Permalink) Posted: Feb. 12 2012,10:23   

Looks bad for the bacterial Arsenate-DNA study:

Quote
Absence of arsenate in DNA from arsenate-grown GFAJ-1 cells

M. L. Reaves, S. Sinha, J. D. Rabinowitz, L. Kruglyak, R. J. Redfield

Wolfe-Simon et al. reported isolation of a strain of Halomonas bacteria, GFAJ-1, which could use arsenic as a nutrient when phosphate is limiting, and which could specifically incorporate arsenic into its DNA in place of phosphorus. We have found that arsenate is not needed for growth of GFAJ-1 when phosphate is limiting. Additionally, we used mass spectrometry to show that DNA purified from cells grown with limiting phosphate and abundant arsenate does not contain detectable arsenate.


http://arxiv.org/abs....01.6643

  
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