Low-frequency Vibrational Modes in Small Polypeptides of Essential Amino Acids
- Authors: Kokabi A.1, Khorram H.G.1, Meivand Z.1, Bayatian T.1, Rad E.G.1
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Affiliations:
- Department of Electrical Engineering, Hamedan University of Technology
- Issue: Vol 127, No 3 (2019)
- Pages: 434-445
- Section: Spectroscopy and Physics of Atoms and Molecules
- URL: https://ogarev-online.ru/0030-400X/article/view/166084
- DOI: https://doi.org/10.1134/S0030400X19090145
- ID: 166084
Cite item
Abstract
The length-dependent low-frequency terahertz absorption spectrum of the essential amino acid chains has been investigated. Since this special type of amino acids cannot be synthesized inside the human body, the feasibility of noninvasively monitoring their deficiency is of significant importance. Here, the considered chains consist of two to six identical essential amino acids forming homogeneous polypeptides. The terahertz vibrational modes are calculated for different chain sizes of these polypeptides. The low-frequency terahertz spectra show unique and specific absorption peaks. Several fascinating patterns for the chain-size-dependent position of the peaks are reported here that are feasible of being applied for their noninvasive detection. For instance, different shared and identical characteristics peaks are observed for the specific polypeptides which are independent of the chain-size. Furthermore, it is shown that the observed trends for the maximum populated peak in some of the essential polypeptides can be considered as a possible footprint for in the terahertz spectrum.
About the authors
Alireza Kokabi
Department of Electrical Engineering, Hamedan University of Technology
Author for correspondence.
Email: alireza.kokabi@hut.ac.ir
Iran, Islamic Republic of, Hamedan, 65155
Hamidreza Ghanbari Khorram
Department of Electrical Engineering, Hamedan University of Technology
Email: alireza.kokabi@hut.ac.ir
Iran, Islamic Republic of, Hamedan, 65155
Zeinab Meivand
Department of Electrical Engineering, Hamedan University of Technology
Email: alireza.kokabi@hut.ac.ir
Iran, Islamic Republic of, Hamedan, 65155
Tina Bayatian
Department of Electrical Engineering, Hamedan University of Technology
Email: alireza.kokabi@hut.ac.ir
Iran, Islamic Republic of, Hamedan, 65155
Ehsan Ghorbani Rad
Department of Electrical Engineering, Hamedan University of Technology
Email: alireza.kokabi@hut.ac.ir
Iran, Islamic Republic of, Hamedan, 65155
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