Biology:Asymmetric PCR
Asymmetric PCR is a variation of PCR used to preferentially amplify one strand of the original DNA more than the other.[1] The technique has applications in some types of sequencing and hybridization probing where having only one of the two complementary strands is required.[2]
Methodology
Asymmetric PCR differs from regular PCR by the excessive amount of primers for a chosen strand. Due to the slow (arithmetic) amplification later in the reaction (after the limiting primer has been used up) extra cycles of PCR are required.[3]
A modification on this process, known as Linear-After-The-Exponential-PCR (LATE-PCR), uses a limiting primer with a higher melting temperature than the excess primer to maintain reaction efficiency as the limiting primer concentration decreases mid-reaction.[4]
Applications
Asymmetric PCR can be used to form single stranded DNA from double stranded DNA, which is then used for DNA sequencing in the mutagenesis method.[citation needed] Single stranded DNA is also important for aptamer generation.[1]
References
- ↑ 1.0 1.1 Citartan, Marimuthu (December 2011). "Asymmetric PCR for good quality ssDNA generation towards DNA aptamer production". Songklanakarin J. Sci. Technol. 34 (2): 125–131. http://rdo.psu.ac.th/sjstweb/journal/34-2/0125-3395-volume-125-131.pdf. Retrieved 2017-11-18.
- ↑ Wooddell, C I; Burgess, R R (1996). "Use of Asymmetric PCR to Generate Long Primers and Single-stranded DNA for Incorporating Cross-linking Analogs into Specific Sites in a DNA Probe". Genome Res. 6 (9): 886–892. doi:10.1101/gr.6.9.886. PMID 8889557.
- ↑ Heiat, Mohammad (14 January 2017). "Essential strategies to optimize asymmetric PCR conditions as a reliable method to generate large amount of ssDNA aptamers". Biotechnology and Applied Biochemistry 64 (4): 541–548. doi:10.1002/bab.1507. PMID 27222205.
- ↑ Sanchez, J. Aquiles (4 December 2003). "Linear-After-The-Exponential (LATE)–PCR: An advanced method of asymmetric PCR and its uses in quantitative real-time analysis". Proceedings of the National Academy of Sciences 101 (7): 1933–1938. doi:10.1073/pnas.0305476101. PMID 14769930.
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