Methodology: simplified preparation of a DNA ladder using PCR |
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Authors: | Wang T-Y Wang L Wang F |
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Institution: | Department of Biochemistry and Molecular Biology, Xinxiang Medical University, Henan, P.R. China. wtianyuncn@126.com |
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Abstract: | Serving as a DNA molecular weight standard, the DNA ladder has been widely used in molecular biology applications. We developed a simple method for the preparation of a DNA marker, which involves designing primers to amplify 100- to 1000-bp DNA fragments using lambda DNA as a template for polymerase chain reaction, followed by extraction with phenol/chloroform, precipitation with ethanol and mixing. Fragments of 100- to 1000-bp DNA were successfully amplified; the sequences showed 100% identity with lambda DNA. This prepared DNA marker displayed clear bands, indicating that it can be used for molecular studies. |
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