Seqanswers Leaderboard Ad

Collapse

Announcement

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

  • Cufflinks performs poorly with biological variance

    Hi,

    I may just not have found the correct set of options, but Cufflinks performs very poorly with my data to the extent that I don't think the program is useful. Here is an example of a gene that is obviously differentially expressed (and is found to be so by other programs such as DESeq and by real time PCR) but which is not by Cufflinks.

    This is the test:
    value_1 value_2 log2(fold_change) test_stat p_value q_value
    439.199 14731.1 5.06784 -1.01836 0.308507 0.999918

    Here's the data calculated by cufflinks:
    R1_count 2188.98
    R1_count_variance 549561
    R1_count_uncertainty_var 9.65605
    R1_count_dispersion_var 319430
    R1_status OK
    R2_count 76824.8
    R2_count_variance 1.09055e+11
    R2_count_uncertainty_var 248.962
    R2_count_dispersion_var 8.00216e+09
    R2_status OK

    Here is the output from HTSeq with the same data (raw counts):
    R1 1: 546
    R1 2 : 1993
    R2 1: 35510
    R2 2: 40164

    There are many cases like this in the data I've tried to analyze with Cufflinks. I've tried several combinations of options and always get the same thing. Any advice would be greatly appreciated, otherwise I'll just give up on the program.

    thanks

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...
    04-22-2024, 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, Yesterday, 11:49 AM
0 responses
13 views
0 likes
Last Post seqadmin  
Started by seqadmin, 04-24-2024, 08:47 AM
0 responses
16 views
0 likes
Last Post seqadmin  
Started by seqadmin, 04-11-2024, 12:08 PM
0 responses
61 views
0 likes
Last Post seqadmin  
Started by seqadmin, 04-10-2024, 10:19 PM
0 responses
60 views
0 likes
Last Post seqadmin  
Working...
X