Jodi Switzer Blum Thomas R. Kulp Gwyneth W. Gordon Shelley E. Hoeft Jennifer Pett-Ridge John F. Stolz Samuel M. Webb Peter K. Weber Paul C.W. Davies Ariel D. Anbar Ronald S. Oremland Felisa Wolfe-Simon 2011 Concerns have been raised about our recent study suggesting that arsenic (As) substitutes for phosphorus in major biomolecules of a bacterium that tolerates extreme As concentrations. We welcome the opportunity to better explain our methods and results and to consider alternative interpretations. We maintain that our interpretation of As substitution, based on multiple congruent lines of evidence, is viable. application/pdf 10.1126/science.1202098 en American Association for the Advancement of Science Response to comments on "A bacterium that can grow using arsenic instead of phosphorus" article