01240nas a2200169 4500008004100000020001400041245006600055210006600121300001400187490000800201520070900209100002400918700002100942700002000963700001500983856007200998 2007 eng d a0009-261400aProtein dynamical transition in terahertz dielectric response0 aProtein dynamical transition in terahertz dielectric response a413 - 4170 v4423 a
The 200K protein dynamical transition is observed for the first time in the terahertz dielectric response. The complex dielectric permittivity ε=ε′+iε″ is determined in the 0.2–2.0THz and 80–294K ranges. ε″ has a linear temperature dependence up to 200K then sharply increases. The low temperature linear dependence in ε″ suggests anharmonicity for temperatures 80K<t<180k, challenging="" the="" assumed="" harmonicity="" below="" 200k.="" temperature="" dependence="" is="" consistent="" with="" thermally="" activated="" sidechain="" motions="" and="" shows="" involved="" in="" dynamical="" transition="" extend="" to="" subpicosecond="" time="" scales.<="" div="">
1 aMarkelz, Andrea, G.1 aKnab, Joseph, R.1 aChen, Jing, Yin1 aHe, Yunfen uhttps://www.sciencedirect.com/science/article/pii/S000926140700680X