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Old 10-12-2018, 06:06 AM   #1
nchuang
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Location: Baltimore

Join Date: Oct 2018
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Default Targeted sequencing workflow?

I have a non-barcoded multiple samples pool of long amplicons sequenced on RSII. I'm trying to figure out the correct workflow. My goal is to perform variant calling.

After reading on this for 2 days this is what I have pieced together:
1. bax2bam conversion
2. blasr alignment all reads to my reference
3. quiver/arrow polishing
4. LAA generate consensus reads
5. blasr (or bowtie even?) to align consensus reads to reference
6. minorseq for variant calling

Does this look correct?

I initially thought CCS subreads would be a good trick to demultiplex my multiple samples (about 70? I don't know why it wasn't barcoded in the first place, I didn't handle that part). However my amplicons are all >5kb and I think I read CCS subreads are more useful for small amplicons (makes sense if these are able to run longer). I just want to see the extent of variation (primarily small variation) in this population of 70 samples.
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