[BioC] Control probe

alex lam (RI) alex.lam at bbsrc.ac.uk
Fri Feb 1 17:16:20 CET 2008

Dear users,

Are all control probesets on affy chips suppose to be house-keeping
(express to a certain extent?)
The AFFX_rat_5s_rRNA probeset on my dataset (rat 230a arrays) seems to
have extremely low intensity across all samples (around 1.3 after
gcrma), I wonder if this is normal?

Many thanks,

Alex C. Lam
Roslin Institute (Edinburgh)
EH25 9PS
United Kingdom
Tel: +44 131 5274471

Roslin Institute is a company limited by guarantee, registered in
Scotland (registered number SC157100) and a Scottish Charity (registered
number SC023592). Our registered office is at Roslin, Midlothian, EH25
9PS. VAT registration number 847380013.

The information contained in this e-mail (including any attachments) is
confidential and is intended for the use of the addressee only.   The
opinions expressed within this e-mail (including any attachments) are
the opinions of the sender and do not necessarily constitute those of
Roslin Institute (Edinburgh) ("the Institute") unless specifically
stated by a sender who is duly authorised to do so on behalf of the

More information about the Bioconductor mailing list