[1] Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA
[2] Univ Oklahoma, Hlth Sci Ctr, Oklahoma City, OK USA
[3] VU, Med Ctr, Dept Mol Cell Biol & Immunol, Amsterdam, Netherlands
[4] Sidney Kimmel Canc Ctr, San Diego, CA USA
[5] Russian Acad Sci, Shemyakin & Ovchinnikov Inst, Moscow, Russia