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Published byCurtis Norton Modified over 9 years ago
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Dr. Soupsana P. Katerina Ioannina, 5/7/13
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What is Real-time PCR? Real-time PCR is the continuous collection of fluorescent signal from one or more polymerase chain reactions over a range of cycles. Quantitative real-time PCR is the conversion of the fluorescent signals from each reaction into a numerical value for each sample.
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Where can I use this method? Gene expression analysis Mutation analysis (genotyping) DNA methylation Mitochondrial DNA analysis Real time immuno-PCR Clinical microbiology and virology Hematology Solid organ transplant monitoring Prenatal diagnosis of monogenic diseases caused by single nucleotide changes
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Real time PCR Instruments Eppendorf Realplex Stratagene Mx3005p Qiagen Rotor-Gene Q Bio-Rad CFX96
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Roche LightCycler 480 Applied Biosystems 7500 Fast BiomarkOpenArray Real time PCR Instruments
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High throughput platforms 96 96 (=9216 reactions) Dynamic Array Open Array 3072 reactions Assays Samples
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Roche Lightcycler
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Real time PCR: an overview
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One or two step RT-PCR?
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ProcedureAdvantages One-stepEasy-Fast Low contamination risk High reproducibility Two-StepMultiple PCRs from a single RT reaction Flexibility with RT primer choice Long-term storage of cDNA Useful when your RNA is in low quantity
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RNA quality and quantity Bioanalyzer-RIN number/Nanodrop
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Common used dyes
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SYBR green method
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LUX (light upon extension) primers
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Plexor system Use of isomers of the bases cytodine and guanine, iso-C and iso-G. Iso-dGTP coupled to a dark quencher dye (DABSYL) Signal goes down instead of up!
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Taqman probes
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Molecular beacons
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FRET probes
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Melting curve analysis
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Standard curve
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Amplification Plot
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Analyze your data
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Choosing a gene for normalization
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ΔCt and ΔΔCt method
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