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  • Fedorov113
    Junior Member
    • Jan 2018
    • 1

    #1

    Per base sequence content problem

    Hello! I am working with Illumina truseq data. R1 strand looks just fine, however, R2 has a per base sequence content problem
    I've done trimming with trimmomatic, here is a screenshot from FastQC.
    What is the best strategy to deal with such kind of issue, and what might be the cause? Should I cut everything past 100 nucleotides? Thank you!
  • GenoMax
    Senior Member
    • Feb 2008
    • 7142

    #2
    Do you expect to see those poly-C and poly-T stretches after ~106 position?

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