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  • To mask or not to mask?

    Hi all,

    I read several threads here and in other bio-forums about masking genome regions. There are different opinions, from don't mask at all to the always do it.

    What do you think?

    I'm realizing my own annotation for a genome and I have quite a number of repeats. I have reads of very different sizes and many samples, so I would like to avoid the most of the background noise (which is already high).
    My questions are 3:

    1. Would you recommend masking with RepeatMasker?
    2. If yes, then should I leave repeats and mask only TEs and other elements?
    3. If again yes, is BLAT still the Gold Standard tool for aligning reads on to a genome with a mask file as option?

    I usually use tophat or STAR but I never worked with masked regions, and apparently they don't deal with them.

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