Simultaneous Monitoring of Discrete Binding Events Using Dual-Acceptor Terbium-Based LRET By courtesy of: Kevin R. Kupcho, Deborah K. Stafslien, Therese DeRosier, Tina M. Hallis, Mary Szatkowski Ozers, and Kurt W. Vogel* J. AM. CHEM. SOC. 2007, 129, 13372