Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • chongm
    Member
    • Sep 2012
    • 21

    #1

    Picard - Where have my reads gone?

    Hi Everyone:

    I had a question regarding the measure, PCT_PF_UQ_READS_ALIGNED, derived by calculatehsmetrics. I know that it is defined as "PF Reads Aligned / PF Reads". For one sample, this turns out to be 0.859744. I have 2960238 PF reads, 30725 unpaired reads, and 77877 unmapped reads, and 1425818 examined read pairs (x2 for reads) were examined.

    Adding together examined reads, unmapped reads, and unpaired reads gives me the total number of 2960238. I calculated that the total number of unpaired reads, unmapped reads, and duplicate reads only account for ~4% of the total reads. If ~86% of my reads mapped to the reference and 4% were unmapped, duplicates, or unpaired, what happened to the remaining 10% of my reads?

    Thanks!

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
25 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 10-28-2026, 09:51 AM
0 responses
15 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...