Chapter 2 Design the Standard Curve Experiment
Set Up the Standards
27
Applied Biosystems 7500/7500 Fast Real-Time PCR System Getting Started Guide for Standard Curve
Experiments
Notes
Design
Guidelines
When you design your own standard curve experiment:
• Set up a standard curve for each target in the reaction plate. The targets are
previously defined on the Targets screen (“Set Up the Targets” on page 24).
• Enter the number of points for each standard curve in the reaction plate. Applied
Biosystems recommends at least five dilution points for each standard curve.
• Enter the number of replicates (identical reactions) for each point in the standard
curve. Applied Biosystems recommends three replicates for each point.
• Because the range of standard quantities affects the amplification efficiency
calculations, carefully consider the appropriate range of standard quantities for your
assay:
– For more accurate measurements of amplification efficiency, use a broad range
of standard quantities, such as between 10
5
and 10
6
. If you specify a broad range
of quantities for the standards, you need to use a PCR product or a highly
concentrated template, such as a cDNA clone.
– If you have a limited amount of cDNA template and/or if the target is a low-copy
number transcript, or known to occur within a given range, a narrow range of
standard quantities may be necessary.
• The serial factor is used to calculate the quantities in all points of the standard curve.
If your starting quantity is the highest quantity, select a dilution factor such as 1:2,
1:3, and so on. If your starting quantity is the lowest quantity, select a concentration
factor such as 2✕, 3✕, and so on.
For More
Information
For more information on:
• Completing the Standards screen – Open the 7500 Software Help by clicking or
pressing F1.
• Amplification efficiency – Refer to the Amplification Efficiency of TaqMan
®
Gene
Expression Assays Application Note.
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