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Related Experiment Videos

An automated hydrodynamic process for controlled, unbiased DNA shearing

Y R Thorstenson1, S P Hunicke-Smith, P J Oefner

  • 1Stanford DNA Sequencing and Technology Center, Palo Alto, California 94304, USA. yvonne@sequence.stanford.edu

Genome Research
|September 2, 1998
PubMed
Summary

A new automated DNA fragmentation method using point-sink hydrodynamics offers controlled, random shearing. This inexpensive and reproducible technique is efficient for molecular biology applications.

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Genomics

Background:

  • Controlled DNA fragmentation is crucial for various molecular biology applications.
  • Existing methods can be complex, expensive, or lack reproducibility.

Purpose of the Study:

  • To develop an automated, inexpensive, and reproducible technique for controlled DNA fragmentation.
  • To optimize the process for reduced sample volume and faster processing times.

Main Methods:

  • Utilized point-sink hydrodynamics by forcing DNA samples through a small hole using a syringe pump.
  • Employed commercially available components for reduced cost and complexity.
  • Automated shearing process through computer control.

Main Results:

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  • Achieved highly reproducible DNA fragmentation with 90% of fragments falling within a twofold size distribution.
  • Identified critical parameters: flow geometry, flow rate, and minimum iterations.
  • Demonstrated reproducibility across various temperatures, DNA concentrations, and initial DNA sizes.

Conclusions:

  • The Point-sink Shearer (PtS) provides a robust and efficient method for DNA fragmentation.
  • The sheared DNA exhibits excellent cloning efficiency without end repair and random sequence distribution.
  • The PtS instrument is user-friendly, cost-effective, and has been successfully implemented in multiple laboratories.