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Related Experiment Videos

High-resolution single-stranded DNA analysis on 4.5 cm plastic electrophoretic microchannels.

Yining Shi1, Rolfe C Anderson

  • 1ACLARA BioSciences, Inc., Mountain View, CA 94043, USA. yshi@ACLARA.com

Electrophoresis
|November 5, 2003
PubMed
Summary

Plastic microchannels enable high-resolution DNA analysis. This technology achieves single-base resolution for fragment sizing and sequencing, crucial for genetic applications.

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Area of Science:

  • Analytical Chemistry
  • Molecular Biology
  • Materials Science

Background:

  • Microchannel electrophoresis is a powerful technique for DNA analysis.
  • Achieving high-resolution DNA fragment sizing and sequencing in microfluidic devices remains a challenge.

Purpose of the Study:

  • To evaluate the performance of plastic microchannels for high-resolution single-stranded DNA analysis.
  • To demonstrate the capability of the system for fragment sizing and DNA sequencing.

Main Methods:

  • Fabrication of 4.5 cm long plastic microchannels from etched glass masters.
  • Utilized replaceable denaturing linear polyacrylamide as a sieving matrix.
  • Performed one-color and two-color DNA fragment sizing, including short tandem repeat (STR) analysis.

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  • Conducted four-color DNA sequencing using a terminator sequencing standard.

    • Main Results:

    • Achieved single-base resolution for fragment sizing up to 275 bases (R > 0.5).
    • Demonstrated single-base resolution (R = 0.62) for short tandem repeat (STR) allelic ladder analysis.
    • Attained high precision in sizing, with standard deviations of +/- 0.06 bp (between runs) and +/- 0.11 bp (between channels).
    • Showcased 99.1% base-calling accuracy for DNA sequencing up to 320 bases in 13 minutes.

    Conclusions:

    • Plastic microchannels are suitable for high-resolution DNA analysis, including fragment sizing and sequencing.
    • The developed system offers precise and accurate results for genetic analysis applications.
    • This technology holds promise for advancing genetic analysis and diagnostics.