PICOSECOND RELAXATION DYNAMICS OF A TEMPERATURE DEPENDENT AMIDE I BAND IN MYOGLOBIN
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Publisher:Ohio State University
We will discuss the infrared absorption spectra of myoglobin and show that it has has a strong temperature dependence and that the relaxation dynamics of the amide I band is strongly dependent on both temperature and wavelength. We show using picosecond pump-probe measurements that a band at 6.17 microns which is strongly temperature dependent has dramatically different relaxation dynamics than the conventional 6.0 microns amide I band, exhibiting an extraordinarily long lifetime and quantum beating phenomena. This state could act as a transient storage of vibrational energy at physiological temperatures in biomolecules and help to direct the path of energy flow in a biomolecule under biological conditions.
Author Institution: Department of Physics, Princeton University; Dept. of Physics, Oklahoma State University; Dept. of Physics, FOM Institute for Plasma Physics
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