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CFX96 and CFX384 Systems Manual
109
Gene Study
Create a Gene Study to compare gene expression data from one or more real-time PCR
experiments using an inter-run calibrator to normalize between the experiments. Create a
Gene Study by adding data from one or more data files (.pcrd extension) to the Gene Study,
the software groups them into a single file (.mgxd extension).
NOTE: The gene expression data must include a common sample in every data file
to create a Gene Study. The software uses the common sample to normalize the
data between experiments. Select the sample names in the Experiment Settings
window (page 48).
NOTE: The maximum number of samples you can analyze in a Gene Study is
limited by the size of the computer's RAM and virtual memory.
Gene Study Inter-Run Calibration
All data within the Gene Study are normalized by inter-run calibrator to calculate the smallest
average
Δ
C(t) value. When the data files within the Gene Study include more than one inter-run
calibrator, then the calibrator with the smallest average
Δ
C(t) value becomes the dominant
inter-run calibrator. The dominant calibrator is used to adjust all C(t) values in the Gene Study.
To find the dominant inter-run calibrator, the software calculates the average of the
Δ
C(t)
values for all inter-run calibrators of a given target (gene), and then uses a multitiered algorithm
to determine the dominant inter-run calibrator within all the data. The algorithm for finding the
dominant inter-run calibrator includes the following hierarchy:
1. Set the dominant calibrator to the target with the highest number of common replicate
groups in a given pair-wise comparison.
2. If any target has the same number of common replicate groups, then set the dominant
calibrator to the target with the smallest range of
Δ
C(t) values in pair-wise comparisons.
The range is examined by comparing the absolute value of the difference between the
maximum and minimum
Δ
C(t) for the inter-run calibrators of a given target.
3. If any target has an identical range as the
Δ
C(t) values, then set the dominant calibrator
to the target with the smallest absolute value of average
Δ
C(t) for eligible inter-run
calibrator samples.
4. If any target has identical average
Δ
C(t) absolute values, then set the dominant calibrator
to the replicate group with the smallest
Δ
C(t).
NOTE: The first data file imported into the Gene Study will always serve as the
“hub” file for pairwise data comparison during inter-run calibration.
Gene Study Window
The Gene Study window includes two tabs:
•
Study Setup tab.
Click this tab to manage the experiments in the Gene Study. Adding or
removing data files in a Gene Study does not change the original data in that file
•
Study Analysis tab.
Click this tab to view the gene expression data for the combined
experiments
Summary of Contents for CFX384
Page 9: ...Table of Contents viii ...
Page 49: ...Protocols 40 ...
Page 89: ...Data Analysis Overview 80 ...
Page 149: ...Resources 140 ...
Page 157: ...Index 148 ...