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  • More than half of Smart-seq2 data is TSO,ISPCR concatemers!

    Hi all,
    Last month, I made fixed tissue (5< RIN < 7) RNA-seq library using SMART-seq2 method. (I thought single cell library prep method is suitable for fixed sample because of low quantity of RNA and even broken RNA could be captured by poly-A primer in RT )

    However, I found that multiple TSO, ISPCR sequences were included in library reads(Mostly less than 300bp reads). Even though I checked library quality by DNA high sensitivity chip, but almost 50% of reads has mostly TSO oligomers.

    Is there anyone who faced same problems? How can I solve this? Any suggestion would be welcomed

  • #2
    What type of size selection did you use?
    I guess, these results are likely due to the lack of size-selection and low inputs? since you were working low integrity/quality RNA samples from fixed tissues?

    We have no experience with such samples, though.

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