[1] Carnegie Mellon Univ, Gaithersburg, MD 20899 USA
[2] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
[3] Inst Biochem, LT-08662 Vilnius, Lithuania
[4] Vilnius Gedimino Tech Univ, LT-08662 Vilnius, Lithuania
[5] Univ Auckland, Dept Chem, Auckland 1142, New Zealand
[6] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA