[1] Univ Montana, Ctr Biomol Struct & Dynam, Ctr Struct & Funct Neurosci, Div Biol Sci, Missoula, MT 59812 USA
[2] Cell Signaling Technol, Danvers, MA 01923 USA
[3] Pathol Consultants Western Montana, Missoula, MT USA
[4] UCL, Res Dept Struct & Mol Biol, Div Biosci, Gower St, London WC1E 6BT, England