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Polyelectrolyte behavior of charged polyamino acids in aqueous solutions
Author(s) -
Ascoli F.,
Botré C.
Publication year - 1963
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.360010407
Subject(s) - chemistry , counterion , polyelectrolyte , aqueous solution , cysteic acid , dilution , aspartic acid , sodium salt , sodium , glutamic acid , activity coefficient , inorganic chemistry , polymer chemistry , amino acid , ion , organic chemistry , polymer , thermodynamics , biochemistry , cystine , physics , cysteine , enzyme
The conductivity and activity coefficient of counterions of sodium salts of some charged polyamino acids, as poly‐ L ‐glutamic acid, poly‐ L ‐aspartic acid, and poly‐ L ‐cysteic acid, were measured in aqueous solution. The results show that the degree of binding of small counterions to the charged macroions shows a characteristic dependence on dilution and temperature which is not common for other simple polyelectrolytes. Such behavior is very likely related to conformational changes induced by the above factors.