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  • berath
    Junior Member
    • Jun 2010
    • 6
    #1

    Question to combine Bowtie output with Tophat's -- impact on Cufflinks FPKM values

    Dear all,

    I am using the latest versions of tophat (as of today) to map a non-model organism's transcriptome to a closely related model organism's genome. After trying almost all available parameters in Tophat, I was only able to get FPKM values for 170 genes (the model organism has ~17,000 genes) as cufflinks output.

    This led me to do separate alignments with Bowtie and once that was fed into cufflinks, I get FPKM values for ~5,000 genes.

    Now, my question is I would like to utilize the isoforms detected by Tophat, however I am not sure how to correctly calculate the FPKM values for the genes that I got reads mapped by both bowtie and tophat.

    Any help is greatly appreciated. Thanks.
    Tags: None
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