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PCR Efficiency Calculation
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This section is used
to calculate the PCR Efficiency for your Reference Gene and your Target Gene.
The PCR Efficiency is important in order to determine the relative
quantification method to use.
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PCR Efficiency: Reference Gene
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The reference gene is
the gene that is used to compare the gene expression to your target gene. In
this section, enter your average Ct values for your reference gene dilutions
in order for the calculator to compute your PCR efficiency.
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NOTE: Dilutions are
done for the gene - before your controls and your treatments
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Dilution Factor
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Average Ct
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Log10 (Dilution Factor)
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1.00000
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Slope
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Formula: Efficiency (%) = (10-1/slope -1) x 100
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PCR Efficiency
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PCR Efficiency: Target Gene
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The target gene is
the gene you want to know the expression. As the expression is relative, you
need a reference gene to compare your target gene.
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NOTE: Dilutions are
done for the gene - before your controls and your treatments
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Dilution Factor
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Average Ct
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Log10 (Dilution Factor)
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1.00000
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Slope
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Formula: Efficiency (%) = (10-1/slope -1) x 100
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PCR Efficiency
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Relative Quantification: Livak
Method
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The Livak
method for relative quantification assumes PCR efficiencies of the target and
reference genes should be between 90 and 100%. Otherwise, you should use the
Pfaffl method.
This calculator generates ∆Ct for control and treatment, the ∆∆Ct and provides with the expression ratio of your
experiment using the Livak Method
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Ct Average (Target, Treatment)
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Ct Average (Reference, Treatment)
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Ct Average (Target, Control)
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Ct Average (Reference, Control)
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ΔCt (Treatment)
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ΔCt (Control)
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ΔΔCt
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Expression Ratio
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Relative Quantification: Pfaffl
Method
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The Pfaffl
method assumes different reaction efficiencies for the reference and target
genes. And it considers the PCR efficiency in the
equation.
If your PCR efficiencies are between 87% and 95%, you can use the Pfaffl
Method
This calculator needs the PCR efficiencies in the formula for the target and reference genes. It
converts the PCR efficiencies into integer numbers. Then use ∆Ct for control
and treatment to calculate the the expression ratio.
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Part 1 PCR Efficiency Integer Conversion
This section converts the above PCR efficiency
numbers into integers, which are used for the Pfaffl Method.
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Efficiency Percent
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Efficiency Integer
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PCR Efficiency Reference Gene
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PCR Efficiency Target Gene
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Do you have
PCR Efficiencies to manullay enter? Use the drop-down menu in the field
immediately below to select.
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Enter PCR Eff. ?
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Efficiency Percent
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Efficiency Integer
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PCR Efficiency Reference Gene
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PCR Efficiency Target Gene
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Part 2 Sample Data Input
Use this section to input data about your
control and treatment samples for your reference and target genes.
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Data Input: Reference
Gene
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Sample Name
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Ct Value: Reference
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Avg Ct Value: Reference
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ΔCt Reference gene
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Control 1
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Averages the control
samples.
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Control 2
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Control 3
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Control 4
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Control 5
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Treatment 1
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Treatment 2
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Treatment 3
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Treatment 4
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Treatment 5
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Data Input: Target
Gene
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Sample Name
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Ct Value: Target
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Avg Ct Value: Target
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ΔCt Target gene
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Control 1
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Averages the controls samples.
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Control 2
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Control 3
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Control 4
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Control 5
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Treatment 1
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Treatment 2
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Treatment 3
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Treatment 4
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Treatment 5
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Part 3 Sample Outputs
This section will generate the expression
ratios for your treatment/control, as well as your average gene expression
and standard deviation.
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Expression ratio:
treatment/control
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Average Gene Expression
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Standard Deviation
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Control 1
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Control 2
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Control 3
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Control 4
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Control 5
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Treatment 1
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Treatment 2
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Treatment 3
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Treatment 4
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Treatment 5
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