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Genetic Barcoding with Fluorescent Proteins for Multiplexed Applications
Published on: April 14, 2015
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Unique Fluorescent Protein-Encoded Microbeads with Supramaximal Encoding Capacity and High Sensitivity for Multiplex
Bingjie Zheng1,2,3, Yuqing Qin1,2,3, Yuqiang Xiang4
1State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
Analytical Chemistry
|April 5, 2023
Summary
We developed a new method using fluorescent proteins and magnetic microbeads to create over 500 unique barcodes for multiplexed biomolecular assays. This approach offers a sensitive, rapid, and cost-effective solution for various research applications.
Area of Science:
- Biotechnology
- Analytical Chemistry
- Materials Science
Background:
- Fluorescence-encoded microbeads (FEBs) are essential for multiplexed biomolecular assays.
- Existing methods for FEB preparation can be complex or costly.
Purpose of the Study:
- To develop a simple, sustainable, low-cost, and safe strategy for preparing FEBs.
- To achieve an ultralarge encoding capacity for multiplexed detection.
Main Methods:
- Assembling fluorescent proteins (FPs) onto magnetic microbeads (MBs) via chemical coupling.
- Utilizing FP type, concentration, and MB size as encoding elements.
- Employing flow cytometry for multiplexed detection of ssDNA molecules.
Main Results:
- Obtained an encoding capacity of 506 barcodes.
- Demonstrated good stability of FP-based FEBs during storage and in organic solutions.
- Achieved femtomolar sensitivity for ssDNA detection without amplification or washing.
Conclusions:
- The developed FP-based FEBs offer high sensitivity, specificity, accuracy, repeatability, and rapidity.
- This cost-effective method has broad applications in disease diagnosis, food safety, environmental monitoring, and drug screening.
