CNV Baseline Creation
In AmpliSeq™ assays, Copy Number estimates are made by counting reads for each
amplicon, making adjustments to account for certain types of variability, comparing
those read counts to expected counts for those amplicons in a "normal" sample, and
then making further adjustment.
Known sources of variability include pool imbalance (when the assay has more than
one pool of amplicons), total number of reads and per amplicon aributes of GC
proportion, and length of the amplicon insert. In practice, we observe other variability
that does not associate with known aributes yet is systematic. The method we use
trains on a large number of diverse samples, captures systematic eects, and encodes
these into a le (the "baseline").
When augmenting a baseline, new samples are run, the size of each systematic eect
encoded in the baseline is estimated, and a correction is applied to remove the eect.
These added samples need not be normal, and should be diverse so as to capture
likely systematic variation.
The following instructions walk you through using the new Variability Correction
Information Baseline (VCIB) CNV baseline, creating a new VCIB CNV baseline, or
augmenting an existing VCIB CNV baseline for Oncomine™ Focus Assay panels.
Use new VCIB CNV Baseline
If you want to use the new VCIB CNV baseline included in Ion Reporter™ Software
v5.0, simply select it when creating your workow. See Create an Ion Reporter™ CNV
Workow section for details.
Create a CNV Baseline
Ion Reporter™ Software provides a wizard to guide you through Copy Number
Variation (CNV) Baseline creation.
1. Click the Workows tab, then click the Presets sub-tab.
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Oncomine™ Focus Assay, Part V: Variant Analysis User Guide
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