Tweet
In a SAM file generated from Bowtie, I found one entry has '*' in the CIGAR field. What does this mean, bad alignment?
Thanks
Thanks
-
-
It means "not available" in the SAM spec. Typically, this happens when the read isn't aligned (RNAME - 3rd field - is also '*' and 0x4 is set in the FLAG field). -
Thanks, arvid.
To what extend, Bowtie sets the FLAG to 0x4 for a read, and make the CIGAR field "not abailable". What are the measure and threshold bowtie uses for setting this?
ThanksComment
-
Well, using the settings (default or your specific choices), Bowtie found no reportable alignment for that read.
It is not possible to make a general statement about this behaviour here as it depends entirely on the settings you provided bowtie with and the nature of your reads and reference. Check the bowtie manual, typically you should look at alignment and reporting modes - these and their sub-options control alignment sensitivity and reporting filters.Comment
-
Hi Arvid,
Thank you very much for the help.Comment
-
Many organizations study rare diseases, but few have a mission as impactful as Rady Children’s Institute for Genomic Medicine (RCIGM). “We are all about changing outcomes for children,” explained Dr. Stephen Kingsmore, President and CEO of the group. The institute’s initial goal was to provide rapid diagnoses for critically ill children and shorten their diagnostic odyssey, a term used to describe the long and arduous process it takes patients to obtain an accurate...12-16-2024, 07:57 AM -
Innovations in next-generation sequencing technologies and techniques are driving more precise and comprehensive exploration of complex biological systems. Current advancements include improved accessibility for long-read sequencing and significant progress in single-cell and 3D genomics. This article explores some of the most impactful developments in the field over the past year.
Long-Read Sequencing
Long-read sequencing has seen remarkable advancements,...12-02-2024, 01:49 PM
Comment