[1] Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA
[2] Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA
[3] Texas A&M Univ, Dept Biochem & Biophys, College Stn, TX 77843 USA
[4] Univ Pavia, Dept Genet & Microbiol, I-27100 Pavia, Italy
[5] St George Hosp, Sch Med, Dept Cellular & Mol Med, London SW17 0RE, England
[6] Univ Southampton, Sch Biol Sci, Div Biochem & Mol Biol, Southampton SO16 7PX, Hants, England
[7] Italfarmaco Res Ctr, I-20092 Milan, Italy
[8] Univ Calif Los Angeles, Inst Mol Biol, Howard Hughes Med Inst, DOE Lab Struct Biol, Los Angeles, CA 90095 USA
[9] Ctr DNA Fingerprinting & Diagnost, Hyderabad 500076, Andhra Pradesh, India
[10] DESY, EMBL Hamburg, D-22603 Hamburg, Germany
[11] Univ Leicester, Dept Biochem, Leicester LE1 7RH, Leics, England
[12] Seoul Natl Univ, Sch Chem & Mol Engn, Struct Prote Lab, Seoul 151742, South Korea
[13] Univ Auckland, Sch Biol Sci, Struct Biol Lab, Auckland 1, New Zealand
[14] Yeshiva Univ Albert Einstein Coll Med, Sch Med, Bronx, NY 10461 USA
[15] Univ Calif Berkeley, Berkeley, CA 94720 USA
[16] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA