ABI Prism® 7900HT Sequence Detection System ... - OpenWetWare

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Real-Time Runs (Quantitative PCR and Dissociation Curves) Troubleshooting Analyzed Data from aReal-TimeRun When faced with irregular data, you can use the SDS software to diagnose some chemistry- and instrument-related problems. The following table contains a summary of checks for verifying the integrity of your run data and to help you begin troubleshooting potential problems. Troubleshooting Analyzed Real-Time Run Data Analysis View/Description What to look for... Raw Data Plot Signal tightness and uniformity – Do the raw spectra signals from replicate groups and controls exhibit similar spectral Displays the raw reporter ‘profiles’? If not, the plate or sample block could be fluorescence signal contaminated. (not normalized) for the selected wells during each Characteristic signal shape – Do the samples peak at the cycle of the real-time PCR. expected wavelengths? For example, samples containing only FAM- labeled TaqMan® probes should not produce raw fluorescence in the wavelength of a VIC dye component. A signal present in wells that do not contain the dye could indicate that the sample, master mix, or well contains contaminants. Characteristic signal growth – As you drag the bar through the PCR cycles, do you observe growth as expected? Absent growth curves may indicate a pipetting error (well lacks template). Signal Plateaus – Do any of the signals plateau? Signal plateaus or saturation can be an indication that a well contains too much template or fluorescent signal. Multicomponent Plot Correct dyes displayed – Does the plot display all dyes as expected? The presence of an unexpected dye may be the Displays a plot of normalized result of an error in detector setup, such as assigning the multicomponent data from a wrong reporter or quencher dye. single well of a real-time run. The plot displays the ROX fluorescence level – Does the ROX signal fluoresce component dye signals that below the reporter dyes? If not, the lack of reporter contribute to the composite fluorescence may be caused by an absence of probe in the signal for the well. well (a pipetting error). Background fluorescence – Do all dyes fluoresce above the background? The Background signal is a measure of ambient fluorescence. If a dye fails to fluoresce above the background, it is a strong indication that the well is missing probes labeled with the dye (well does not contain probe, PCRmastermix,orboth). MSE Level – The MSE (mean squared error) is a mathematical representation of how accurately the multicomponented data fits the raw data. The higher the MSE value, the greater the deviation between the multicomponented data and the raw data. Troubleshooting 8-11
8-12 Troubleshooting Troubleshooting Analyzed Real-Time Run Data (continued) Analysis View/Description What to look for... Amplification Plot Displays data from real-time runs after signal normalization and Multicomponent analysis. It contains the tools for setting the baseline and threshold cycle (C T ) values for the run. Correct baseline and threshold settings – Are the baseline and threshold values set correctly? Identify the components of the amplification curve and set the baseline so that the amplification curve growth begins at a cycle number that is greater than the highest baseline number. IMPORTANT Do not adjust the default baseline if the amplification curve growth begins after cycle 15. Identify the components of the amplification curve and set the threshold so that it is: ♦ Above the background ♦ Below the plateaued and linear regions ♦ Within in the geometric phase of the amplification curve Irregular amplification – Do all samples appear to have amplified normally? The three phases of the amplification curveshouldbeclearlyvisibleineachsignal. Outlying amplification – When the run data is viewed in the CT vs. Well Position plot, do replicate wells amplify comparably? Wells producing CT values that differ significantly from the average for the associated replicate wells may be considered outliers. If a plate produces non-uniformity between replicates, some samples on the plate could have evaporated. Check the seal of the optical adhesive cover for leaks.
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ABI PRISM ® 7900HT Sequence Detect
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© Copyright 2001, Applied Biosyste
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iv Section:PlateDocumentSetup......
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vi A Theory of Operation Fluorescen
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Attention Words and Warning Labels
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About Waste Profiles A waste profil
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Safe Instrument Use Before Operatin
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Product Overview 2 In This Chapter
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Section: Getting to Know the Hardwa
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Interchangeable Thermal Cycler Bloc
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Computer Description The computer c
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Zymark Twister Microplate Handler D
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Instrument Connections Electrical C
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Section: Getting to Know the Softwa
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Managing Sequence Detection System
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Getting Started 3 In This Chapter T
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Using the SDS Software Online Help
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Turning on the ABI PRISM 7900HT Seq
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Using the SDS Software Workspace La
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Using the General Toolbar Using the
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Basic Software Skills Tutorial Abou
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Exercise 3: Opening a Plate Documen
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Lesson 2: Viewing and Resizing Pane
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Exercise 2: Selecting Multiple Well
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Lesson 4: Using the Hand-Held Bar C
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Using SDS Plate Documents Using Mul
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Run Setup and Basic Operation 4 In
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Setup Checklists Experiments/Runs P
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Section: Plate Document Setup In Th
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Step 2 - Applying Detectors and Mar
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Creating an Allelic Discrimination
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Step 3 - Configuring the Plate Docu
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Step 4 - Programming the Plate Docu
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To create a method for the absolute
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Step 5 - Saving the Plate Document
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Step 7 - Applying Sample and Plate
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Section: Running an Individual Plat
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Preparing and Running a Single Plat
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Operating the 7900HT Instrument Usi
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After the Run Analyzing the Run Dat
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Section: Running Multiple Plates Us
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Adding a Plate Document to the Plat
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To create plate documents from a te
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Adding Plates to the Plate Queue Re
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Loading Plates To load plates onto
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End-Point Analysis 5 In This Chapte
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Section: Allelic Discrimination In
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Algorithmic Manipulation of Raw All
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Before You Begin Using SDS Online H
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Analyzing a Completed Allelic Discr
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Calling Allele Types To call allele
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Scrutinizing the Allele Calls To an
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After the Analysis Changing the Pla
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Real-Time Runs on the 7900HT Instru
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Overview About Absolute Quantificat
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Before You Begin Using SDS Online H
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Analyzing the Run Data Configuring
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Setting the Baseline and Threshold
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Eliminating Outliers For any PCR, e
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Viewing the Standard Curve 6-14 Rea
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6-16 Real-Time Analysis
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Overview About Dissociation Curve A
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Analysis Checklist WhereYouArein th
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Determining T m Values for the Anal
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After the Analysis Changing the Pla
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Recommended Maintenance Schedule Ma
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Replacing the Sample Block When to
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7-6 System Maintenance To remove th
Page 139 and 140: 7-8 System Maintenance To replace t
Page 141 and 142: 7-10 System Maintenance To replace
Page 143 and 144: Cleaning the Sample Block Wells 7-1
Page 145 and 146: Prepare a Background Plate Document
Page 147 and 148: Extracting the Background 7-16 Syst
Page 149 and 150: Materials Required The following ma
Page 151 and 152: Extracting Pure Dye Information fro
Page 153 and 154: Constructing a Custom Pure Dye Plat
Page 155 and 156: Verifying Instrument Performance Us
Page 157 and 158: Preparing and Running an RNase P Pl
Page 159 and 160: Adjusting the Sensitivity of the Pl
Page 161 and 162: Testing the Adjustment 7-30 System
Page 163 and 164: Aligning the Plate Handler When to
Page 165 and 166: 7-34 System Maintenance To align th
Page 167 and 168: Re-checking the Input Stack 1 7-36
Page 169 and 170: Defining the Positions of the Remai
Page 171 and 172: Aligning the Fixed-Position Bar Cod
Page 173 and 174: 7-42 System Maintenance To position
Page 175 and 176: 7-44 System Maintenance
Page 177 and 178: General Computer Maintenance Mainte
Page 179 and 180: Maintaining the SDS software Admini
Page 181 and 182: Troubleshooting Table 8-2 Troublesh
Page 183 and 184: Low Precision or Irreproducibility
Page 185 and 186: Writing on the Reaction Plates Fluo
Page 187 and 188: Background Runs Background Troubles
Page 189: Pure Dye Runs Pure Dye Troubleshoot
Page 193 and 194: Software and 7900HT Instrument Trou
Page 195 and 196: 8-16 Troubleshooting Troubleshootin
Page 198: User Bulletins 9 9 About This Chapt
Page 201 and 202: Fluorescent-Based Chemistries Funda
Page 203 and 204: Fluorescence Detection and Data Col
Page 205 and 206: Normalization of Reporter Signals A
Page 207 and 208: Determining Initial Template Concen
Page 209 and 210: Calculating Threshold Cycles A-10 T
Page 212 and 213: Importing and Exporting Plate Docum
Page 214 and 215: Configuring the Setup Table File wi
Page 216 and 217: About the Setup Table File Format S
Page 218 and 219: Setup Table Elements (continued) Nu
Page 220 and 221: Exporting Plate Document Data Expor
Page 222 and 223: Designing TaqMan Assays C In This A
Page 224 and 225: Design Probes and Primers The follo
Page 226 and 227: Design Tips for Allelic Discriminat
Page 228 and 229: Kits, Reagents and Consumables D In
Page 230 and 231: Consumables and Disposables The ABI
Page 232: TaqMan Pre-Developed Assays and Rea
Page 236: Contacting Technical Support F Serv
Page 239 and 240: G-2 Limited Warranty Statement No a
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A(continued) Automation Controller
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I(continued) installing plate adapt
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Q quantifying probes and primers C-
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Headquarters 850 Lincoln Centre Dri
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