Nucleic Acids Research Advance Access originally published online on September 13, 2006
Nucleic Acids Research 2006 34(17):e113; doi:10.1093/nar/gkl593
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Nucleic Acids Research, 2006, Vol. 34, No. 17 e113
© 2006 The Author(s)
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Methods Online |
A simple DNA stretching method for fluorescence imaging of single DNA molecules
Cardiovascular Research Institute and Institute for Human Genetics University of California, San Francisco CA, USA
*To whom correspondence should be addressed. 513 Parnassus Avenue, HSW-901A, San Francisco, CA 94143, USA. Tel: +1 4155143876; Fax: +1 4154762956; Email: m.xiao{at}ucsf.edu
Received June 10, 2006. Revised July 28, 2006. Accepted July 31, 2006.
Stretching or aligning DNA molecules onto a surface by means of molecular combing techniques is one of the critical steps in single DNA molecule analysis. However, many of the current studies have focused on
-DNA, or other large DNA molecules. There are very few studies on stretching methodologies for DNA molecules generated via PCR (typically smaller than 20 kb). Here we describe a simple method of stretching DNA molecules up to 18 kb in size on a modified glass surface. The very low background fluorescence allows efficient detection of single fluorescent dye labels incorporated into the stretched DNA molecules.
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