I did get the first data from a 2x260 bp run of genomic DNA. The quality of the second read was not this great - beginning from the first bases. I was lucky that my library had an average insert size of only 450 b - thus there was a huge overlap. Ea-utils fastq-join was able to merge 61% of the reads. This run generated 2x16 million reads.
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A few pictures regarding v2 quality are attached from our phiX control run (2x250bp). However, when we tried to use our inhouse amplicon products, we got quite ugly results...Last edited by Vinz; 09-17-2012, 05:49 AM.
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These are some pictures showing the quality of our first run (2x250 bp and 2 indices) where we tried to do amplicon sequencing. The same library had been run with the 300 kit successfully giving nice reads and good Q values.
I was told there was not enough diversity. We will give it a try and spike in more phiX. But I am not sure this is the only problem. The constructs are based on the published TrueSeq sequences. A second run went even worse... Any feedback is appreciated.
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Our run looked better, but not as good as I hoped for. Attached is a plot of the 2nd 260 bp read (the reverse read). (There should have been no complexity related problem with this library.)Attached Files
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Originally posted by behavin View PostAccording to our FAS, as long as the software is updated you are able to set the "good" matrix, as well as run the 2x250. You won't get the increased data outputs and faster cycle times until the hardware upgrade however.
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Did you not get the sticker for your machine that says "I have been upgraded".
Originally posted by james hadfield View PostOurs was upgraded today. It even came with a thank you card!Last edited by GenoMax; 09-21-2012, 06:27 AM.
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Originally posted by james hadfield View PostOurs was upgraded today. It even came with a thank you card!Last edited by ScottC; 09-23-2012, 09:40 PM.
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You may wish to invest in a phiX run. It can potentially save you time down the road.
Our upgraded MiSeq (which had passed optical tests), required a service call because a phiX run (done after the fact due to quality issues with samples) did not pass illumina quality standards.
Originally posted by jertlse View PostHello everybody
Our Miseq will be updated next week, customer service said us that they don't make any Phix control run, only optic tests. Is there the same in your lab?
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Ours didn't have a verification run (it was OK after the first run, too). They don't do it by default. If you're worried, then you can always ask Illumina for a sequencing kit to test the machine. Otherwise, if you do the recommended PhiX spike-in on your first run (if you don't do it routinely), then you can check the quality that way. I'm sure they will service the machine and replace the reagents if it's not up to scratch.
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