Entering edit mode
Peter Saffrey
▴
70
@peter-saffrey-3645
Last seen 10.3 years ago
I am using the affy library to compute RMA values on mouse exon
arrays,
using the mouseexonpmcdf from here:
http://xmap.picr.man.ac.uk/download#mmcdf
It works fine, but I wanted to check some of the details of the
implementation and hoped somebody on this list could help.
As I understand it, the background correction step of the RMA
calculation usually works on the mismatch (MM) probes on the array.
However, on the exon array, there are no MM probes, so the calculation
is done based on a separate pool of background probes. There is a
description here:
http://media.affymetrix.com/support/technical/whitepapers/exon_backgro
und_correction_whitepaper.pdf
Is this seamlessly happening behind the scenes when I run RMA with the
mouse exon CDF or do I need to do something else to ensure the proper
background correction is taking place?
Peter