[BioC] Affymetrix - index of probes

[Benjamin Haibe-Kains]

Hi,

I want to compare affy hgu133a and hgu133plus2 chips. When I retrieve 
the index of different probes on these two chips, the function 
indexProbes (see affy package) returns a list of 16 probes for the pm 
and 16 probes for the mm for each probe set.

However, we can see in the Affymetrix doument 
http://www.affymetrix.com/support/technical/datasheets/human_datasheet.pdf
that there are only 11 probes per probe set ! I don't understand the 
origin of the 5 exceeded probes ...

Can you help me ?

thanks

NB: this email is maybe duplicated ...

-- 
Benjamin Haibe-Kains

Licence in Computer Science
Master in Bioinformatics
Free University of Brussels (ULB)
E-mail: bhaibeka at ulb.ac.be 

MicroArray Unity
Institute Jules Bordet (IJB)
E-mail: benjamin.haibekains at bordet.be