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  • IMGarner
    Junior Member
    • Jun 2016
    • 1

    ATAC-seq in mouse cell lines

    Hello,
    This is my first post. I have done multiple ATAC-seq libraries on human cell lines with no problems. Now I'm doing some ATAC on mouse lines.

    After 5+6 cycles, I get good nucleosome patterns on the bioanalyser and good concentration of DNA (using 100k cells) as determined by Qubit/bioanalyser.

    My major problem is - when running the qPCR side reaction after the 5 cycles of amplification, (done to determine how many more cycles to amplify) I get nothing. Zero amplification on qPCR.

    Does anyone have any suggestions?
    There are several papers which have used the same Nextera primers (the ones listed in the Buenrostro paper), on mouse cell lines.

    - I have tested two different SYBRs
    - My beads work fine (see attached imagine of bioanalyser)
    - Has always worked well on human cell lines.

    Any help greatly appreciated,
    Bw,
    Ian.
    Attached Files

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    Love this - good data definitely starts from good input, and poor input can only give relatively poor data. I particularly like the mention of Nanodrop/absorbance based methods for quantification. It's such a toss up if you'll get an accurate reading or what amounts to a randomly generated number, and a lot of library/sequencing related issues can be traced back to poor quant.
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  • SEQadmin2
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    I’m not a sequencing expert. I’m a purification scientist who uses NGS to evaluate workflows my group develops. With this perspective, we think about the sample first and the NGS workflow second. The sequencer is an exceptionally honest reporter, but it can only report on what you give it, so whether you get clean, interpretable data from an NGS workflow is largely determined before you begin.

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