Bioinorganic Chemistry DOI: 10.1002/anie.200604805 Pentavalent Arsenic Can Bind to Biomolecules** Andrea Raab, Stephen H. Wright, Marcel Jaspars, Andrew A. Meharg, and Jörg Feldmann* Angewandte Chemie Communications 2594 # 2007 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Angew. Chem. Int. Ed. 2007, 46, 2594 –2597