'''Senere forsøg har ikke kunnet eftervise det første forsøgsresultat''' – der var tale om fosforforurening fra laboratoriet. <ref> {{cite journal | title = Absence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells | journal = Science | date = 8. juli 2012 | first = Marshall Louis | last = Reaves | author2 =  Sunita Sinha | author3 =  Joshua D. Rabinowitz | author4 =  Leonid Kruglyak | author5 =  Rosemary J. Redfield| id = {{doi | 10.1126/science.1219861 }} | url = http://www.sciencemag.org/content/early/2012/07/06/science.1219861 | access-date = 2012-07-24 | quote = we have found that arsenate does not contribute to growth of GFAJ-1}}</ref>
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