Target sequence heterogeneity causes the 'hook effect' in fluorescent dye-based quantitative PCR

The 'hook effect' describes a phenomenon in quantitative PCR (qPCR) amplification curves where fluorescence values decrease following an initial amplification phase. We propose that in intercalating dye-based qPCR, the 'hook effect' is due to the amplification of heterogeneous bu...

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Veröffentlicht in:BioTechniques. - 1988. - 69(2020), 2 vom: 07. Aug., Seite 80-83
1. Verfasser: Warton, Kristina (VerfasserIn)
Weitere Verfasser: Xu, Yue, Ford, Caroline Elizabeth
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:BioTechniques
Schlagworte:Letter Research Support, Non-U.S. Gov't hook effect optimization quantitation quantitation artifact quantitative PCR Fluorescent Dyes Intercalating Agents DNA 9007-49-2
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520 |a The 'hook effect' describes a phenomenon in quantitative PCR (qPCR) amplification curves where fluorescence values decrease following an initial amplification phase. We propose that in intercalating dye-based qPCR, the 'hook effect' is due to the amplification of heterogeneous but related DNA targets. The decrease in fluorescence at later cycles occurs because the related products self-anneal to form a DNA heteroduplex with a melt temperature below the temperature at which the fluorescence measurement is made. We show this experimentally using qPCR of Alu family repetitive DNA elements 
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700 1 |a Xu, Yue  |e verfasserin  |4 aut 
700 1 |a Ford, Caroline Elizabeth  |e verfasserin  |4 aut 
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