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Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
Published on: July 22, 2013
High-throughput Peptide epitope mapping using carbon nanotube field-effect transistors
Steingrimur Stefansson1, Martha Knight, Hena H Kwon
1Fuzbien Technology Institute, 9700 Great Seneca Highway, Rockville, MD 20850, USA.
International Journal of Peptides
|August 20, 2013
Summary
Single-walled carbon nanotube field-effect transistors (SWCNT-FETs) enable high-throughput, label-free peptide assays. This technology allows rapid epitope mapping for pharmaceutical development, reducing time and cost.
Area of Science:
- Biotechnology
- Nanotechnology
- Analytical Chemistry
Background:
- Label-free, real-time detection technologies are crucial for efficient pharmaceutical development.
- High-throughput automation is essential for realizing the full potential of these technologies.
- Single-walled carbon nanotube field-effect transistors (SWCNT-FETs) offer a promising platform for sensitive biosensing applications.
Purpose of the Study:
- To demonstrate the utility of SWCNT-FETs for high-throughput peptide-based assays.
- To adapt SWCNT-FET technology for standard 96-well plate formats compatible with multichannel pipettors.
- To perform rapid linear epitope mapping using SWCNT-FETs.
Main Methods:
- Designed SWCNT-FET circuits in an 8 × 12 (96-well) format.
- Utilized nonfunctionalized SWCNTs for direct immobilization of 15-mer peptides from an HIV-1 gp160 library.
- Performed epitope mapping of two HIV-1 gp160 antibodies in real-time.
Main Results:
- Achieved real-time binding data for all 96 circuits without peptide linkers.
- Demonstrated that immobilized peptides on SWCNTs are accessible for antibody binding.
- Obtained results in good agreement with known epitope data, despite sequence variations.
Conclusions:
- SWCNT-FETs are adaptable to high-throughput formats for peptide-based assays.
- Linear epitope mapping can be rapidly performed in minutes using SWCNT-FETs.
- This technology significantly enhances pharmaceutical testing and development efficiency.
