Issue 15, 2012

Rapid protein concentration, efficient fluorescence labeling and purification on a micro/nanofluidics chip

Abstract

Fluorescence analysis has proved to be a powerful detection technique for achieving single molecule analysis. However, it usually requires the labeling of targets with bright fluorescent tags since most chemicals and biomolecules lack fluorescence. Conventional fluorescence labeling methods require a considerable quantity of biomolecule samples, long reaction times and extensive chromatographic purification procedures. Herein, a micro/nanofluidics device integrating a nanochannel in a microfluidics chip has been designed and fabricated, which achieves rapid protein concentration, fluorescence labeling, and efficient purification of product in a miniaturized and continuous manner. As a demonstration, labeling of the proteins bovine serum albumin (BSA) and IgG with fluorescein isothiocyanate (FITC) is presented. Compared to conventional methods, the present micro/nanofluidics device performs about 104–106 times faster BSA labeling with 1.6 times higher yields due to the efficient nanoconfinement effect, improved mass, and heat transfer in the chip device. The results demonstrate that the present micro/nanofluidics device promises rapid and facile fluorescence labeling of small amount of reagents such as proteins, nucleic acids and other biomolecules with high efficiency.

Graphical abstract: Rapid protein concentration, efficient fluorescence labeling and purification on a micro/nanofluidics chip

Supplementary files

Article information

Article type
Paper
Submitted
10 Oct 2011
Accepted
13 Apr 2012
First published
30 May 2012

Lab Chip, 2012,12, 2664-2671

Rapid protein concentration, efficient fluorescence labeling and purification on a micro/nanofluidics chip

C. Wang, J. Ouyang, D. Ye, J. Xu, H. Chen and X. Xia, Lab Chip, 2012, 12, 2664 DOI: 10.1039/C2LC20977B

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