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  • arcolombo698
    Senior Member
    • Nov 2013
    • 142

    #1

    Including Indels Deletions from dbSNP to Reduce False Positives

    Hello.

    I am interested in removing false positives from an RNAseq experiment using an aligner Tophat parameter

    --insertions/--deletions <.juncs file>

    Supply TopHat with a list of insertions or deletions with respect to the reference. Indels are specified one per line, in a tab-delimited format, identical to that of junctions. Records look like:


    I am supposing I would get the dbSNP file from the database.

    Advice for those who have used this parameter for alignments?

    I am interested in minimizing false positives from the alignment.
    there are two ways to achieve validation of your data
    1) use different software to get similar comparisons
    2) supply a more accurate pipeline.


    As of now, I use trimming software to remove the adapters, and align the complete fastq file to the reference. But if there are large indels/deletions this could be problematic.

    Thank you in advance

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