Chem. J. Chinese Universities ›› 2005, Vol. 26 ›› Issue (9): 1612.

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Analysis of D-Aspartic Acid and D-Glutamic Acid in Single Cells by Capillary Electrophoresis

ZHAO Shu-Lin, SHEN Jiang-Shan   

  1. College of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, China
  • Received:2004-09-08 Online:2005-09-10 Published:2005-09-10

Abstract: An analytical method was established to detect D-aspartic acid(D-Asp) and D-glutamic acid(D-Glu) in single cells. Cellular samples were derivatized with a fluorescence tagging reagent, naphthalene-2,2-dicarboxaldehyde in a mini-volume(3 μL) prior to the separation. Sixteen pair of amino acid enantiomers resolution was achieved by using a dual chiral selector system consisting of β-cyclodextrin(β-CD) and chiral micelles formed by sodium deoxycholate(SDC). The separation was coupled with laser induced fluorescence detection. Single neurons isolated from the ganglia of Aplysia were analyzed to determine the D/(D+L) molar ratios of Asp to Glu. D-Asp and D-Glu were found at high levels and its cellular distribution was highly heterogeneous.

Key words: D-Aspartic acid, D-Glutamic acid, Chiral separation, Single cells analysis, Capillary electrophoresis

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