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  • #61
    it sounds great...and dreaming is fun (just thinking of water skiing with my own yacht) but I prefer things that are usable right now.

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    • #62
      Originally posted by ajthomas View Post
      I was talking to a LifeTech guy (a technical specialist, not R&D, so take it for what it's worth) the other day and he mentioned Avalanche. As I'm still not clear on what it is exactly I asked him for more detail. While he didn't explain how it works, he did tell me that it will be used on the PIII chip and that he has seen perfect 600 bp reads obtained in house with it.
      Ion has this perverse obsession with "the perfect read" -- which is utterly useless from a practical standpoint. There may be one perfect read, but you can't tell which one it is in actual use. It's a meaningless statistic that is almost certainly distracting them from focusing on the real issues. It makes about as much sense in this situation as one perfect limousine.

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      • #63
        News today is that Jonathan Rothberg is leaving Life Tech. Hopefully it is just the outcome of putting an entrepreneurial guy in a huge merged company rather than any concerns about the future of the Proton system.

        http://www.forbes.com/sites/matthewh...-technologies/
        Providing nextRAD genotyping and PacBio sequencing services. http://snpsaurus.com

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        • #64
          Originally posted by ajthomas View Post
          I was talking to a LifeTech guy (a technical specialist, not R&D, so take it for what it's worth) the other day and he mentioned Avalanche. As I'm still not clear on what it is exactly I asked him for more detail. While he didn't explain how it works, he did tell me that it will be used on the PIII chip and that he has seen perfect 600 bp reads obtained in house with it. If that's true, and if we actually see it at the customer level, that will really be something.

          *Of course, this is all heresay at this point, so take it for what it's worth, which might not be much. We've heard similar grand claims from ONT and have yet to actually see anything available to us. It's nice to dream.
          600 bp reads? on a PIII chip? Sounds highly suspect to me. They are still trying to get 400 bp reads on a PII chip from the field application specialist I spoke to last month when we were getting training on our new proton. From what I heard the PIII chip is still quite a while away, since the PII chip isn't even release yet it makes business sense to focus all R&D on that. Even the PI chip only has 100 bp reads because quality degrades when the reads go longer.

          Since the smaller chips can get longer reads and the large chips can't I can only assume that there is some sort of noise interference introduced by scaling the chip up.

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          • #65
            Do you have a Proton in your lab in Thailand? How is it performing?

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            • #66
              We do, so far has only run the test human samples. So nothing really to report. But they worked fine. We will do an RNA-seq run soon.

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              • #67
                Would be great to see some stats once you have some runs on. Thanks ...

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                • #68
                  There are some statistics from the throughput competition. Maybe some of the users could share more info.

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                  • #69
                    Originally posted by Jeremy View Post
                    600 bp reads? on a PIII chip? Sounds highly suspect to me. They are still trying to get 400 bp reads on a PII chip from the field application specialist I spoke to last month when we were getting training on our new proton. From what I heard the PIII chip is still quite a while away, since the PII chip isn't even release yet it makes business sense to focus all R&D on that. Even the PI chip only has 100 bp reads because quality degrades when the reads go longer.

                    Since the smaller chips can get longer reads and the large chips can't I can only assume that there is some sort of noise interference introduced by scaling the chip up.
                    That is what he said, but as I said, he was a technical specialist, not an R&D guy, so it's 2nd hand at best. It's not hard to imagine details getting lost along the way. He did say, however, that it was with Avalanche, so it is a completely different amplification procedure and may not be comparable to what we're doing now with beads. Based on what he said, I was left with the impression that the PIII chip will work with Avalanche and not with beads at all.

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                    • #70
                      Well I hope he is right, 600 bp reads on such a high output chip would be great.

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                      • #71
                        Custom amplicons

                        Hi,

                        We´re currently thinking about buying the PGM, and this thread has been very helpful (We already have the MiSeq).

                        One of our principle drivers for buying the PGM is for the custom amplicon technology; we want to sequence small panels of genes in large numbers of patients.

                        When designing the panel on the Illumina Design Studio, many of the targets gave 0% design efficiency on the first attempt. We contacted Illumina, and they basically said ´yeah, we know, it doesn´t work so well´. This is in contrast to their custom exome, which works very well.

                        On the other hand, the Life/Ion version of this seems to work very well on the design level.

                        Does anyone have experience with either the Ion or Illumina custom amplicon methods? Any thoughts or tips? I´m thinking that with our throughput it´s worth buying the PGM for this method alone, but I´m worried about the negative comments I´ve seen about PGM.

                        Thanks!

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                        • #72
                          If you can get an amplicon panel to amplify targets properly, why not still use the MiSeq for readout?

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                          • #73
                            What are the important drivers for your decision?
                            Total throughput? Turn around time? Analysis?
                            PGM run is hours, but Miseq can produce more total data in 1-3 days.

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                            • #74
                              Re: jrbell71: as far as I know, the Life panels are not compatible with running on MiSeq (some people are trying to work out protocols I believe). Also, since the gene panels are small (about 13 kb cumulative sequence), the MiSeq would be overkill as it gives way more sequence than necessary.

                              Re: snetmcom: The main driver is good quality sequence for mutation detection. We don´t need a very rapid turnaround. A good depth of coverage, and relatively straightforward analysis would be nice!

                              Thanks.

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                              • #75
                                so what are they ever going to release the PII chips or what?

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