Intramural Research Support Program, Science Applications
International Corporation, Laboratory of Experimental and Computational
Biology, and Laboratory of Experimental and Computational
Biology, National Cancer Institute–Frederick Cancer Research and
Development Center, Building 469, Room 151, Frederick, MD 21702; and
Sackler Institute of Molecular Medicine, Sackler Faculty of
Medicine, Tel Aviv University, Tel Aviv 69978, Israel (At 1999-08-31)