Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Isabel_Bodmer
    Junior Member
    • Nov 2011
    • 2

    #1

    sequencing primer annealing

    Hi everybody
    I am new here and would like to first say thank you for this great forum. I'm looking forward to being active in it.
    I have a problem with emPCR lib L. Everything worked fine until the very last step, the sequencing primer annealing. All our heating blocks were occupied so I used one of another group. I had problems with checking the temperature and it is possible that the temperature hadn't reached 65°C yet when I put in my sample. At the end I figured it out and the temperature was right, but it's possible that it was only on 55°C or so at the beginning.
    Now I'm afraid that the primers may have bound nonspecifically or that it was only for some 2-3 minutes at 65°C and not enough primers could bind to the DNA.
    I would have enough sequencing primers for another annealing round. Do you think I could add some melting solution to remove all sequencing primers and the perform washes with annealing buffer and then again perform the sequencing primer annealing step?
    I really hope you can give me some advice soon. Thanks in advance.
    Cheers,
    Isabel
  • Nicole 454 Sequencing
    Member
    • Apr 2011
    • 19

    #2
    Hi Isabel,

    I wouldn't proceed with sequencing until repeating the sequencing primer anneal step here. You can perform the Melt step as specified in section 3.6.1 of the emPCR Methods Manual and then skip ahead to the sequencing primer annealing (section 3.7).

    Please don't hesitate to contact your local Roche representative with any further issues.

    Nicole

    Technical Support Scientist
    454 Life Sciences, A Roche Company

    Comment

    • Isabel_Bodmer
      Junior Member
      • Nov 2011
      • 2

      #3
      Hi Nicole
      Thanks for the advice.
      I have already repeated the melting and annealing step and the sequencing worked fine.
      Cheers,
      Isabel

      Comment

      Latest Articles

      Collapse

      • SEQadmin2
        16S/ITS Profiling vs. Shotgun Metagenomics: What Changes in Your Workflow?
        by SEQadmin2




        NGS has revolutionized clinical microbiology by offering new ways to identify and surveil pathogens without prior knowledge of the target. One popular approach is 16S rRNA and ITS amplicon sequencing, which targets specific microbial markers. But studies are increasingly incorporating shotgun metagenomics, a technique that sequences all DNA from a sample without targeting specific microbial markers. This approach allows more detailed taxonomic classification, detection...
        Yesterday, 06:46 AM
      • SEQadmin2
        Multiomic Liquid Biopsy: What DNA/RNA Panels Reveal That DNA Alone Can’t
        by SEQadmin2



        Tumors contain complex mixtures of cell populations that evolve in response to treatment and host-specific factors. Tissue biopsies provide only static snapshots of a tumor’s state. But what if we could follow that evolution over time using a minimally invasive technique?

        Liquid biopsies can detect tumor-derived material circulating in the bloodstream, providing a way to study treatment response, detect emerging resistance, and discover new biomarkers. Circulating
        ...
        10-14-2026, 09:55 AM

      ad_right_rmr

      Collapse

      News

      Collapse

      Topics Statistics Last Post
      Started by SEQadmin2, 10-28-2026, 09:57 AM
      0 responses
      29 views
      0 reactions
      Last Post SEQadmin2  
      Started by SEQadmin2, 10-28-2026, 09:51 AM
      0 responses
      18 views
      0 reactions
      Last Post SEQadmin2  
      Started by SEQadmin2, 10-22-2026, 11:13 AM
      0 responses
      71 views
      0 reactions
      Last Post SEQadmin2  
      Started by SEQadmin2, 10-22-2026, 10:48 AM
      0 responses
      48 views
      0 reactions
      Last Post SEQadmin2  
      Working...