[1] Univ Illinois, Dept Chem, Urbana, IL 61801 USA
[2] Bernhard Nocht Inst Trop Med, D-20359 Hamburg, Germany
[3] Univ London London Sch Hyg & Trop Med, Dept Infect & Trop Dis, London WC1E 7HT, England
[4] Chicago Med Sch, Dept Biochem & Mol Biol, N Chicago, IL 60064 USA
[5] Natl Inst Infect Dis, Dept Parasitol, Shinjuku Ku, Tokyo 1628640, Japan
[6] Keio Univ, Sch Med, Dept Trop Med & Parasitol, Tokyo 108, Japan
[7] Univ Illinois, Ctr Biophys & Computat Biol, Urbana, IL 61801 USA
[8] Univ Illinois, Ctr Zoonoses Res, Urbana, IL 61802 USA