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5 votes
2 answers
1k views

Reads mapped to exonic, intronic and intergenic regions

After the alignment step I checked the rnaseq metrics of all the samples. Among 40 samples three samples show high percentage of reads mapped to intronic regions. What could be the reason? ...
stack_learner's user avatar
3 votes
1 answer
3k views

Strange per sequence GC content results

I would be grateful if someone could take a quick look at these FASTQC results. This is rna-seq paired-end data. From the FASTQC manual, an unusual distribution seems to be suggestive of contamination ...
beginner's user avatar
  • 631
1 vote
1 answer
584 views

Alignment QC differences between HISAT2 and Qualimap

I used hisat2 for aligning reads to to the genome. I have an alignment summary for sample1 as follows: ...
beginner's user avatar
  • 631