Document Detail


Coil-helix transition in poly(L-glutamic acid): Evidence for a 3-state non-cooperative process.
MedLine Citation:
PMID:  23053818     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
A careful analysis of measurements of circular dichroism of poly(L-glutamic acid) (PGA) shows that the data can be very accurately described by introducing a third state for the PGA configuration, in addition to the helix and coil ones, and considering a simple equilibrium between these three states, without cooperativity. The third state is more conspicuous when high molecular weight polyethyleneglycol (PEG) is added. Excluded-volume effects shown by differences in the presence of short and long PEG chains suggest a direct interaction of PEG and PGA rather than an osmotic effect.
Authors:
G Zalczer
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Publication Detail:
Type:  Journal Article     Date:  2012-10-11
Journal Detail:
Title:  The European physical journal. E, Soft matter     Volume:  35     ISSN:  1292-895X     ISO Abbreviation:  Eur Phys J E Soft Matter     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101126530     Medline TA:  Eur Phys J E Soft Matter     Country:  France    
Other Details:
Languages:  eng     Pagination:  9776     Citation Subset:  IM    
Affiliation:
Service de Physique de l'Etat Condensé, CEA Saclay, 91191, Gif-sur-Yvette cedex, France, Gilbert.Zalczer@cea.fr.
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