"Glass transition" in peptides: Temperature and pressure effects

We report on the origin of the liquid-to-glass transition in a series of oligopeptides of γ -benzyl-L-glutamate up to the polymer (PBLG), and in Poly-Z-L-lysine (PZLL) and Polyglycine (PGly) using dielectric spectroscopy as a function of temperature and pressure. We show that temperature is the dominant control variable of the dynamics associated with the peptidic "glass transition." This is an intrinsic feature of the peptide dynamics, irrespective of the type of amino acid and of the peptide secondary structure. The influence of the type of secondary structure (α helix vs ß sheet) on the liquid-to-glass dynamics is discussed. © 2005 American Institute of Physics.


Published in:
Journal of Chemical Physics, 122, 22, 1-4
Year:
2005
Keywords:
Note:
00219606 (ISSN), Export Date: 25 September 2007, Source: Scopus, CODEN: JCPSA, doi: 10.1063/1.1931657
Other identifiers:
Scopus: 2-s2.0-20544469384
View record in Web of Science
Laboratories:




 Record created 2007-10-15, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)