"Оптика и спектроскопия"
Издателям
Вышедшие номера
Low-Frequency Vibrational Modes in Small Polypeptides of Essential Amino Acids *
Kokabi Alireza1, Khorram Hamidreza Ghanbari1, Meivand Zeinab1, Bayatian Tina1, Rad Ehsan Ghorbani1
1Department of Electrical Engineering, Hamedan University of Technology, Hamedan, Iran
Email: alireza.kokabi@hut.ac.ir
Поступила в редакцию: 6 октября 2018 г.
Выставление онлайн: 20 августа 2019 г.

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. Key words: essential amino acid chains, terahertz spectrum. -18

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