A report in 2010 of the possibility in the bacterium GFAJ-1, was announced, though the research was disputed, and evidence suggests the bacterium actively prevents the incorporation of arsenic into the DNA backbone and other biomolecules.
En rapport om denne mulighed i bakterien GFAJ-1 blev bebudet i 2010, selvom forskningen var omstridt, og beviserne peger i retning af, at bakterien aktivt forhindrer inkorporeringen af arsen i DNA-rygraden og andre biomolekyler.