Hi Julien,
the mart team takes the affy mappings directly from the ensembl core
databases so I am forwarding on the mail to the main helpdesk as they can
probably give you a much better answer on the exact details of the
mapping. They are definitely using the second approach though of mapping
the probe sequences to ensembl transcripts
best wishes
Damian
On Mon, 26 Feb 2007, Julien Roux wrote:
Dear bioamrt team,
I was wondering if in the tool Biomart, the mapping Ensembl transcript <=>
Affy ID was taken from Affymetrix description, or if each Affymetrix probe
was blasted by you against Ensembl .
In the first case, in which extent can we rely on it ?
In the second case, what happens if one probe is matching more than one
transcript ? For example I'm thinking of duplicate genes...
Thanks for your help
Julien
