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  • Fragment Size shift on Egel bye using the new TruSeq protocol ?

    I am using the TruSeq protocols for RNA and DNA and I follow exactly the protocol, except I’m using an Egel (Egel: Invitrogen ‘Size Select’ 2%, Ladder: Invitrogen 100bp, 20ng/ul) before PCR instead of an Agarose Gel.
    If I take my fragment size I want to use e.g. 600bp for my PCR and I run a Bioanalyzer after I see fragments around 500bp. So I have always to repeat my PCR's taking fragments around 700bp or higher to get fragments around 600bp.
    This phenomenon I can see for DNA and RNA.

    Anybody knows this problem?
    Should I use a different Ladder?
    Is the new adapter changing the migrating in the Egel?

    thanks a lot for your help!

  • #2
    I replied on your other thread.

    Comment


    • #3
      Yes, please do not duplicate post.

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