Transactivation Functions of the Tumor-Specific HMGA2/LPP Fusion Protein Are Augmented by Wild-Type HMGA21 Geconcerteerde Onderzoeksacties grant 2002/10, Cancer Research Program of “Fortis Verzekeringen,” Fund for Scientific Research (FWO-Vlaanderen Krediet Aan Navorsers) grant 1.5.098.03, and Belgian Federation against Cancer project A5890. Note: M.M.R. Petit is a postdoctoral fellow of the Fund for Scientific Research, Flanders, Belgium (FWO-Vlaanderen). E.M.R. Vanoirbeek is currently in the Department of Pathophysiology, Laboratory for Skeletal Development and Joint Disorders, University of Leuven, Herestraat 49 bus 813, B-3000 Leuven, Belgium.