Question: bias correction (an example from ChIP-seq)
gravatar for Bogdan
3.6 years ago by
Palo Alto, CA, USA
Bogdan1.0k wrote:

Dear all, I would have a more general question regarding bias correction in ChIP-seq, and i would appreciate having your suggestions.

Let's assume that someone did a ChIP-seq for a protein in 2 conditions (a. CTL, and b. KD), and we compare : 1 -- all the genes in the genome ("all") , vs 2. -- a specific subset ("subset").

After KD, there is some increase in ChIP seq intensity genome-wide (for "all" genes), although the increase on the genes in "subset" is much stronger. more specifically, looking at the MEDIAN values in each experiment, let's assume :

CTL -- "all" genes : 10

KD -- "all" genes : 20

CTL -- "subset" genes : 15

KD -- "subset" genes : 45

The question would be : what type of scaling procedure (beside computing the Z-scores), would you recommend in order to bring CTL--"all genes" and KD--"all genes" on approx the same median value ?

thank you very much,

-- bogdan

chip-seq bias correction • 682 views
ADD COMMENTlink written 3.6 years ago by Bogdan1.0k

I recommend you to read this review:

ADD REPLYlink written 3.6 years ago by biostart350
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