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  • Is there a paired end joiner which writes also the reads before merging?

    Hi, I have a weird question. But I'm looking for a software which not just merge the paired reads but also writes them in a new file.

    When a software matches a pair of reads it writes them in the output fastq (or fasta), but you don't have the option of knowing what they paired. I've checked some of them but mostly they create a file with the unpaired reads as the set of the discarded ones. I've been trying to find one which would give an output like that

    SAMPLE_MATCHED_FORWARD.fastq
    SAMPLE_MATCHED_REVERSE.fastq
    SAMPLE_JOINED.fastq

    the first two files would contain the reads that are going to be merged, but have been already found their mate. Is there a software with an option like that? I know it sounds weird but it could help me to discriminate from a pool containing a lot of unwanted sequences from different sources.

    thanks for your time.

  • #2
    If it's not a problem to run the command twice, bbmerge can do this:

    Code:
    bbmerge.sh in1=SAMPLE_INPUT_FORWARD.fastq in2=SAMPLE_INPUT_REVERSE.fastq
    out1=SAMPLE_MATCHED_FORWARD.fastq out2=SAMPLE_MATCHED_REVERSE.fastq merge=f
    Code:
    bbmerge.sh in1=SAMPLE_INPUT_FORWARD.fastq in2=SAMPLE_INPUT_REVERSE.fastq
    out=SAMPLE_JOINED.fastq merge=t
    Run bbmerge.sh without options for a list of possible options. See also this thread.

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