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Determination of weighted density of states of vibrational modes in Zn-substituted myoglobin

✍ Scribed by Jeung Sun Ahn; Yasuo Kanematsu; Makoto Enomoto; Takashi Kushida

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
485 KB
Volume
215
Category
Article
ISSN
0009-2614

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✦ Synopsis

Site-selective fluorescence spectroscopy has been performed for Zn-substituted myoglobin in the lowest optical absorption band at 4 K. The single-site fluorescence spectrum as well as the distribution of the zero-phonon transition energy have been obtained. Furthermore, the density of states of vibrational modes of myoglobin weighted by the coupling strength between the chromophore and the polypeptide chain has been determined from the analysis of the obtained spectrum. This is the first case in which the weighted density of states of low-frequency vibrational modes has been determined in biological materials without employing any model shape functions. The results are compared with those for dye-doped polymers.

πŸ“œ SIMILAR VOLUMES

Low frequency vibrational modes in the g
Low frequency vibrational modes in the glassy state of 1-cyanoadamantane: The density of states from incoherent neutron scattering
✍ M. BΓ©e; P. Derollez; P. Gasnier; R. Fouret πŸ“‚ Article πŸ“… 1989 πŸ› Elsevier Science 🌐 English βš– 405 KB

From inelastic neutron scattering the density of vibrational states of l-cyanoadamantane has been measured both in its low-temperature monoclinic phase and its glassy phase. A strong increase in the low-frequency part of the spectrum in the glassy state with respect to the ordered state is shown. Wh