A chiral ligand exchange CE essay with zinc(II)– l-valine complex for determining enzyme kinetic constant of l-amino acid oxidase
A new strategy for the enantioseparation of d, l-amino acids employing the principle of ligand exchange capillary electrophoresis with Zn(II)– l-valine complex as a chiral selecting system in the presence of β-cyclodextrin has been designed. Successful enantioseparation of label free and labeled ami...
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Published in | Talanta (Oxford) Vol. 81; no. 4; pp. 1554 - 1559 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
15.06.2010
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | A new strategy for the enantioseparation of
d,
l-amino acids employing the principle of ligand exchange capillary electrophoresis with Zn(II)–
l-valine complex as a chiral selecting system in the presence of β-cyclodextrin has been designed. Successful enantioseparation of label free and labeled amino acids have been achieved with a buffer of 100.0
mM boric acid, 5.0
mM ammonium acetate, 4.0
mM β-cyclodextrin, 4.0
mM ZnSO
4 and 8.0
mM
l-valine at pH 8.1. This new method was shown to be applicable to the quantitative analysis of label free
d- and
l-aromatic amino acids. Furthermore, the expanding enzymatic use of
l-amino acid oxidase to incubate with different
l-amino acids has allowed understanding of the substrate's specificity. An on-column incubation assay has been developed to study the
l-amino acid oxidase's catalytic efficiency. It was demonstrated that the enzyme kinetic constant could be determined by using this new method. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0039-9140 1873-3573 |
DOI: | 10.1016/j.talanta.2010.03.001 |