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How can I identify the library ID in the fastq file name?

Dear NGS experts,

I just started to analyse NGS data. I recently received some files that were generated at EMBL. I want to start analyzing them but have a hard time to figure out the read groups in order to start with GATK data preprocessing (from FASTQ to BAM).
I am using the following article to learm about the different read groups i need to build the BAM file: here
My FASTQ file name is structured exactly as the one in the red rectangle in the image below. Sadly there is no "lib" in the file name.
Can anyone identify the read groups, especially the library identifier for me?
The Image source is from here.

Thank you so much.



Best Answer


  • SkyWarriorSkyWarrior TurkeyMember ✭✭✭

    Open the Bam file with samtools using samtools view filename.bam | head -n 25

    You should be able to see readgroup ids from mapped reads directly from bam.

    Or just open them bam file using IGV and click on a read.

  • Hi Skywarrior. Sorry perhaps I did not explain it properly.

    I received just some fastq files. No bam files. Now I try to build bam files using Picard.
    Thus I have to specify read group tags.
    Using the file name I can read off the sample name and the lane id. But I don't know which of the name parts resemble the library id.

    Can you identify the different read groups from the file name in the red backet?


  • Great,
    this is exactly what I did in the mean time.
    Now I have all the information for starting the conversion from fastq to ubam.

    the library name should be the 4s002434.

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