Seqanswers Leaderboard Ad

Collapse

Announcement

Collapse
No announcement yet.
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Increasing MiSeq v3 cycle number for >600bp reads

    Hello people!

    We have a sequencing application where we could really need, say, 50–100 more cycles from a 600-cycle MiSeq v3 kit.

    Illumina states that the cartridge contains reagents for 625 cycles [1] (to account for dual indices we don't need, so 10–15 more cycles there already).
    Then again, ECO got about 370 cycles from a 300 cycle kit [2] which is a fair bit more than the 325 stated by Illumina. Other people also mentioned that they pushed above the 25 reserve index cycles [3].

    Lastly, this post explains how MadsAlbertsen got 600 cycles from a 400 cycle kit by filling up some wells with reagents from leftover cartridges.

    So, my question: Does anybody has experience with increasing the cycle number on the 600-cycle v3 kits and can tell me what safely works? Either by experimenting how many possible cycles are in one cartrige or by filling up from an old cartridge.

  • #2
    People have been doing similar things on the HiSeq too - but the issue here isn't whether it's technically feasible to hack the kits, it's whether your application will be able to cope with the awful sequencing quality of anything over 300bp in length. If you routinely use the 600 cycle kits, you'll know how the R2 drop off is - so imagine what this is going to be like after 700 cycles...

    But see also: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3673215/

    Comment


    • #3
      Thanks, what they did in the paper looks really cool. And yes, I am aware of the decreasing quality, but a small amount of data (after filtering) helps us more than none, in this case...

      Comment


      • #4
        Have you considered using nanopore sequencing if you need long(er) reads? No hacking of sequencer needed.

        Comment


        • #5
          Not for this, as it's an antibody library and we need a single paired read with low error rate to cover one fragment. Hacking it will probably be

          Comment


          • #6
            If you do not need high number of reads, PacBio CCS will be a good option as it will cover the whole fragment length with very high accuracy.

            Comment

            Latest Articles

            Collapse

            • seqadmin
              Essential Discoveries and Tools in Epitranscriptomics
              by seqadmin


              The field of epigenetics has traditionally concentrated more on DNA and how changes like methylation and phosphorylation of histones impact gene expression and regulation. However, our increased understanding of RNA modifications and their importance in cellular processes has led to a rise in epitranscriptomics research. “Epitranscriptomics brings together the concepts of epigenetics and gene expression,” explained Adrien Leger, PhD, Principal Research Scientist on Modified Bases...
              Yesterday, 07:01 AM
            • seqadmin
              Current Approaches to Protein Sequencing
              by seqadmin


              Proteins are often described as the workhorses of the cell, and identifying their sequences is key to understanding their role in biological processes and disease. Currently, the most common technique used to determine protein sequences is mass spectrometry. While still a valuable tool, mass spectrometry faces several limitations and requires a highly experienced scientist familiar with the equipment to operate it. Additionally, other proteomic methods, like affinity assays, are constrained...
              04-04-2024, 04:25 PM

            ad_right_rmr

            Collapse

            News

            Collapse

            Topics Statistics Last Post
            Started by seqadmin, 04-11-2024, 12:08 PM
            0 responses
            55 views
            0 likes
            Last Post seqadmin  
            Started by seqadmin, 04-10-2024, 10:19 PM
            0 responses
            51 views
            0 likes
            Last Post seqadmin  
            Started by seqadmin, 04-10-2024, 09:21 AM
            0 responses
            45 views
            0 likes
            Last Post seqadmin  
            Started by seqadmin, 04-04-2024, 09:00 AM
            0 responses
            55 views
            0 likes
            Last Post seqadmin  
            Working...
            X