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Vibrational Energy-Spectra and Infrared Absorption of α-Helical Protein Molecules |
| PANG Xiao-Feng1,2;CHEN Xiang-Rong3 |
| 1Institute of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054
2International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
3Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 |
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| Cite this article: |
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PANG Xiao-Feng, CHEN Xiang-Rong 2002 Chin. Phys. Lett. 19 1096-1099 |
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Abstract The quantum energy-spectra, including high excited states, of
vibrational amide-I or of intramolecular excitations in α-helical protein molecules, are calculated by the discrete nonlinear Schrödinger equation together with the parameters appropriate to the systems. The distribution of energy levels obtained is basically consistent with the experimental values obtained by infrared absorption and Raman scattering. Utilizing the energy-spectra we explain the laser-Raman spectrum from metabolically active escherichia coli and we present some further features of the infrared absorption of the protein molecules.
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| Keywords:
33.20.-Ea
33.10.-n
78.30.-j
87.50.Hi
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Published: 01 August 2002
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