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Doesn't match if U nucleotide used in sequence #68

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keenhl opened this issue Feb 26, 2024 · 3 comments
Open

Doesn't match if U nucleotide used in sequence #68

keenhl opened this issue Feb 26, 2024 · 3 comments

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@keenhl
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keenhl commented Feb 26, 2024

If you have an RNA sequence with U's, the U's will have to be converted to T's to get an alignment. Just something users might want to be aware of.

@StevenWingett
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Hi,

Thanks for you message. So far as I am aware, NGS sequencers actually sequence DNA or cDNA (e.g. in RNA-seq experiments). Consequently, FASTQ files will contain A, C, T, G (or N).

Is this some new format I need to be aware of that contains Us?

Thanks,

Steven

@keenhl
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keenhl commented Feb 27, 2024

Thanks for the response. I got some fastq files generated from a Nanopore direct sequencing of RNA and there were Us instead of Ts. Not sure if that is the default with this kind of experiment or just something the investigators did in the basecalling step.

@StevenWingett
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Hi,

Thanks for bringing this to my attention. I'll raise an issue for me to look into.

Best,
Steven

@StevenWingett StevenWingett reopened this Feb 28, 2024
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