 The "Science" article "A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus" appeared in the June 3, 2011 print version of "Science"; it had remained on the "Publication ahead of print" ScienceXpress page for six months after acceptance for publication.However, Rosemary Redfield and other researchers from the University of British Columbia and Princeton University performed studies in which they used a variety of different techniques to investigate the presence of arsenic in the DNA of GFAJ-1 and published their results in early 2012.The group found no detectable arsenic in the DNA of the bacterium.