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Dynamic range of fluorescence detection and base-calling accuracy in DNA sequencer based on single-photon counting.
Dmitri N Gavrilov1, Boris Gorbovitski, Mikhail Gouzman
1Department of Electrical and Computer Engineering, State University of New York, Stony Brook 11794, USA. gavrilov@ece.sunysb.edu
Electrophoresis
|April 23, 2003
Summary
We improved DNA sequencing instruments by addressing single-photon detector nonlinearity. This enhances detection range and base-calling accuracy for high-performance sequencing.
Area of Science:
- Genomics
- Molecular Biology
- Biotechnology
Background:
- Automated capillary DNA sequencing instruments utilize single-photon detection.
- High-performance instruments require superior sensitivity and dynamic range.
- Single-photon detector nonlinearity can limit instrument performance.
Purpose of the Study:
- To discuss limitations in DNA sequencing instrument performance caused by single-photon detector nonlinearity.
- To present methods for compensating single-photon detector nonlinearity.
- To improve detection dynamic range and base-calling accuracy in DNA sequencing.
Main Methods:
- Development of high-performance automated capillary DNA sequencing instruments.
- Application of digital and broadband techniques for enhanced sensitivity and dynamic range.
- Analysis of single-photon detector nonlinearity effects on instrument performance.
Main Results:
- Nonlinearity in single-photon detectors was identified as a performance limitation.
- Methods for nonlinearity compensation were developed and discussed.
- Compensation techniques were shown to increase detection dynamic range and base-calling accuracy.
Conclusions:
- Addressing single-photon detector nonlinearity is crucial for optimizing DNA sequencing instruments.
- Nonlinearity compensation methods enhance the reliability and accuracy of DNA sequencing.
- The developed techniques contribute to advancing high-performance automated DNA sequencing technology.