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Terahertz time‐domain spectroscopy of poly‐ L ‐lysine
Author(s) -
Kambara Ohki,
Tamura Atsuo,
Uchino Takashi,
Yamamoto Kohji,
Tominaga Keisuke
Publication year - 2010
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.21467
Subject(s) - lysine , chemistry , spectroscopy , amorphous solid , crystallography , domain (mathematical analysis) , terahertz radiation , polymer science , nanotechnology , physics , materials science , optoelectronics , biochemistry , amino acid , mathematical analysis , mathematics , quantum mechanics
Poly‐ L ‐lysine is known to have three different secondary structures depending on solvent conditions because of its flexible nature. In previous work (Kambara et al., Phys Chem Chem Phys 2008, 10, 5042‐5044), we observed two different types of structural changes in poly‐ L ‐lysine. In the present study, we investigated the low‐frequency spectrum of poly‐ L ‐lysine with a β‐sheet structure in the solid state by terahertz time‐domain spectroscopy. On the basis of this spectroscopic analysis, we found that the low‐frequency dynamics differed from those of other polypeptides. Furthermore, we performed powder X‐ray diffraction measurement on poly‐ L ‐lysine, which was found to be highly amorphous compared with other polypeptides. © 2010 Wiley Periodicals, Inc. Biopolymers 93: 735–739, 2010. This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com