期刊
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
卷 27, 期 5, 页码 1167-1173出版社
SPRINGER
DOI: 10.1007/s11274-010-0563-8
关键词
Lambda exonuclease; Single stranded DNA; Optimization; Aptamer
资金
- Universiti Sains Malaysia
- Ministry of Science, Technology and Innovation (MOSTI), under Brain Gain Malaysia
The generation of DNA aptamer by Systematic Evolution of Ligands by Exponential Enrichment requires a good method of ssDNA generation. There are various methods developed to generate ssDNA such as streptavidin-biotin based separation techniques, asymmetric PCR and strand separation of the PCR product containing primer with a terminator and an extension of 20 nucleotides on denaturing urea-polyacrylamide gel. In the present investigation, we have shown the possible improvements for the regular lambda nuclease digestion under optimized conditions. Optimization of the PCR cycles, time course studies on lambda nuclease digestion and purification of the ssDNA from the lambda exonuclease digestion mixture was found to be able to recover ssDNA amounting up to 39.19 +/- A 2.48 % of the starting amount of dsDNA. These strategies can be applied to the techniques involving essential usage of ssDNA.
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