Question: Illumina HiSeq reads and Fastq joiner
0
gravatar for anacrys7
3.6 years ago by
anacrys70
Portugal
anacrys70 wrote:

 Hello,

I have paired-end reads (Illumina HiSeq) from a metagenome in two Fastq files. These non-overlapping reads  (the exact lengths of gaps are not known) have already been quality checked, and I want to concatenate them into one file. I was thinking of using Fastq Joiner, but I have a doubt... When sequencing paired ends with Illumina HiSeq 2500, the R2 sequences will be in reverse direction respect to their R1, right? When I use Fastq Joiner, what it does is simply glue the 2 seqs together, as they are (without reversing the R2) and with no sign for the internal gap (eg. and N). Does this make sense? Do I need to do a reverse complement of my R2 reads?

Thanks!

galaxy • 1.9k views
ADD COMMENTlink modified 3.6 years ago • written 3.6 years ago by anacrys70
0
gravatar for Anton Nekrutenko
3.6 years ago by
Penn State
Anton Nekrutenko1.7k wrote:

You don't need to RC them. But why do you need to put them into a single file?

ADD COMMENTlink written 3.6 years ago by Anton Nekrutenko1.7k
0
gravatar for anacrys7
3.6 years ago by
anacrys70
Portugal
anacrys70 wrote:

Thanks a lot Anton.

I want to go on to assembly by Megahit and thought I needed to join my R1/R2 seqs, but, reading again, I now seem to understand that Megahit can handle the 2 files at the same time: do you know? Or do you have any alternative suggestion?

Thanks again! Regards.

ADD COMMENTlink written 3.6 years ago by anacrys70
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