We demonstrated that MLL-AF4, MLL-AF5q31, and MLL-LAF4 activated Elk-1 transcription factor, one of the major downstream effectors of Ras.     ///    "Elk-1-driven luciferase reporter system was used to study the role of MLL-AF4, MLL-AF5q31, MLL-LAF4, MLL-CDCrel, MLL-MSF, and MLL-Septin 6 in the activation of Ras signaling. "