[1] Univ Kansas, Computat Biol Program, 2030 Becker Dr, Lawrence, KS 66045 USA
[2] Univ Kansas, Dept Mol Biosci, 2030 Becker Dr, Lawrence, KS 66045 USA
[3] Argonne Natl Lab, Struct Biol Ctr, Xray Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA
[4] Univ Chicago, Ctr Struct Genom Infect Dis, 929 E 57th St, Chicago, IL 60637 USA