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Temperature (T in °C) and stem-length dependence of the relaxation rate kr for (AU)mCGC5CG(AU)m with m = 2 (solid line), m = 3 (dashed line), and m = 4 (dotted line). The rollover temperature (Tr) and melting temperature (Tm) are different for the sequences. At T < Tr, the kr-value decreases as T is decreasing; at Tr < T < Tm, the kr-value increases as T is decreasing; and at T > Tm, the kr-value increases as T is increasing.
