No I did not know that those tests even exist...
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Originally posted by SarahAurora View PostIt's not our MiSeq, we just use it from our cooperation partner. I'll check if they have a maintenance contract with Illumina. Nevertheless, I wrote tech support an email with all details.
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Onboard diagnostics are in the "System Check" icon under "Manage Instrument" from the main screen on the Miseq Control Software. The optics checks are fairly fast to run, the fluidics will take some time and babysitting (raising and lowering sippers as prompted).
Has your partner had any successful runs since your failed run?
Edit: Asking me to run these tests is usually what Tech Support has me do first when I call them with an issue. Enough so that I'll sometimes run them prior to calling...
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If this failure is due to hardware/reagent problem (and the partner has a maintenance contract with Illumina) then Illumina generally will replace the reagents at no cost, so you should be able to re-run your samples for free (or at least no charge for the reagents).
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Originally posted by GW_OK View PostOnboard diagnostics are in the "System Check" icon under "Manage Instrument" from the main screen on the Miseq Control Software. The optics checks are fairly fast to run, the fluidics will take some time and babysitting (raising and lowering sippers as prompted).
Has your partner had any successful runs since your failed run?
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Originally posted by GenoMax View PostIf this failure is due to hardware/reagent problem (and the partner has a maintenance contract with Illumina) then Illumina generally will replace the reagents at no cost, so you should be able to re-run your samples for free (or at least no charge for the reagents).
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I run primarily amplicons too so the metrics that I look for are a bit different than the standards that Illumina uses (our runs don't meet the base diversity that makes some of the standard number make sense).
From the %q30 it looks like something bad happened part way through R1-amplicons aren't really long enough, optics issue, fluidics issue. Whatever it was *seems* to be machine/reagent related because it didn't improve after the turnaround. Are you spiking in primers or do your amplicons use Illumina sequencing primers? If you make an error spiking in the primers, you won't see anything after the turn around.
My list to check (roughly in order)
1. %phiX aligned. is it close to what I thought I was spiking in?
2. %base does it look appropriately horrible (my 16s amplicons should be at 90% for the first ~50 bases, then decline to ~80% for the rest of the read)
3. Cluster density across flowcell, top and bottom
4. thumbnails, does the density seem about right
5. fwmh. The software is not made for 90% single base, focus issues are common, but fwmh shouldn't be too jaggedMicrobial ecologist, running a sequencing core. I have lots of strong opinions on how to survey communities, pretty sure some are even correct.
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The sequencing world is rapidly changing due to declining costs, enhanced accuracies, and the advent of newer, cutting-edge instruments. Equally important to these developments are improvements in sequencing analysis, a process that converts vast amounts of raw data into a comprehensible and meaningful form. This complex task requires expertise and the right analysis tools. In this article, we highlight the progress and innovation in sequencing analysis by reviewing several of the...-
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