Related Experiment Video
Updated: Jun 14, 2026
09:57
A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
Published on: December 23, 2016
Separation of dipeptides with two chiral centers using 2-hydroxypropyl-beta-CD-modified MEKC
Ying Chen1, Jianhua Zhang, Lan Zhang
1Ministry of Education Key Laboratory of Analysis and Detection for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, Fuzhou, Fujian, PR China.
Electrophoresis
|April 9, 2010
Summary
Chiral separation of dipeptides was achieved using precolumn derivatization with naphthalene-2,3-dicarboxyaldehyde and micellar electrokinetic chromatography (MEKC). This method effectively resolved enantiomers in human serum samples within 14 minutes.
Area of Science:
- Analytical Chemistry
- Separation Science
- Biochemistry
Background:
- Chiral separation of dipeptides is crucial for understanding biological processes.
- Direct UV detection of non-derivatized dipeptides with chromophores is possible, but chiral separation remains challenging.
- Existing chiral selectors and conditions were insufficient for separating dipeptide enantiomers.
Purpose of the Study:
- To develop a robust method for the chiral separation of dipeptides with two chiral centers.
- To overcome limitations in separating non-derivatized dipeptide enantiomers.
- To apply the developed method for analyzing dipeptide enantiomers in biological matrices.
Main Methods:
- Precolumn derivatization of dipeptides using naphthalene-2,3-dicarboxyaldehyde.
- Chiral separation employing micellar electrokinetic chromatography (MEKC).
- Utilization of 2-hydroxypropyl-beta-cyclodextrin (2-hydroxypropyl-beta-CD) and sodium deoxycholate as chiral selectors and micelle-forming agents.
Main Results:
- Successful chiral separation of naphthalene-2,3-dicarboxyaldehyde-tagged dipeptide enantiomers was achieved.
- High resolution of all enantiomers was obtained within a 14-minute separation time.
- The method demonstrated applicability to the chiral separation of dipeptide enantiomers in spiked human serum samples.
Conclusions:
- The developed derivatization and MEKC method provides effective chiral separation for dipeptides.
- This technique offers a sensitive and efficient approach for analyzing dipeptide enantiomers.
- The method's successful application in human serum highlights its potential for clinical and biochemical research.
Related Concept Videos
01:30Capillary Electrophoresis: Applications
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
02:34Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
02:05Prochirality
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
01:20¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
02:25Molecules with Multiple Chiral Centers
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...