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Related Experiment Videos

Fluorescence-based sequencing of double-stranded DNA by hexamer string priming

A F Johnson1, M A Lodhi, W R McCombie

  • 1Lita Annenberg Hazen Genome Center, Cold Spring Harbor Laboratory, New York 11724-0100, USA.

Analytical Biochemistry
|October 15, 1996
PubMed
Summary

This study introduces a novel DNA sequencing method using hexamer primers and T7 Sequenase. The protocol achieves high accuracy and read lengths, showing promise for directed sequencing projects.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Biotechnology

Background:

  • Traditional DNA sequencing methods can be labor-intensive and costly.
  • Optimizing primer design is crucial for efficient and accurate DNA sequencing.

Purpose of the Study:

  • To develop and evaluate a novel fluorescence-based DNA sequencing method.
  • To assess the utility of contiguous hexamers as primers for DNA sequencing.

Main Methods:

  • A T7 Sequenase dye terminator method was employed for double-stranded DNA sequencing.
  • Linearized pUC19 DNA was used as a template, with three contiguous hexamers as primers.
  • Sequencing involved cycles of denaturation, annealing, and extension/termination.

Main Results:

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  • Twenty-two of 33 tested hexamer strings yielded acceptable sequence data with read lengths of 300-400 bases.
  • Base-calling accuracy was at least 97% in controlled studies.
  • Sequencing both strands of pUC19 using 28 hexamer strings achieved a 75% successful priming rate.

Conclusions:

  • The developed hexamer-primed sequencing protocol is robust for shotgun sequencing projects.
  • The method demonstrates potential for semiautomation and directed DNA sequencing applications.