Abstract
Two special dynamical transitions of universal character have been recently observed in macromolecules (lysozyme, myoglobine, bacteriorhodopsin, DNA, and RNA) at TD= 180 - 220 K and T*= 100 K. The first represents the threshold of biological activity and the transition from an anharmonic to harmonic dynamical regime of motion in hydrated biomolecules. The second represents the onset of a …