Hi Tim,

The coordinates for the U133 Affymetrix probes can be found in the 
affyU133 table. The relevant fields are tName, tStart, and tEnd. qName 
is the name of the probes.

You can use the Table Browser to get all of this information.

Click on "Tables" in the blue menu bar at the top of the page.
Make these selections:
clade: Mammal
genome: Human
assembly: Mar.2006
region: genome
group: Expression
track: Affy U133
table: affyU133
output format: selected fields from primary and related tables
Click "get output".
Select the following fields (and any others you are interested in 
getting the data for): tName, tStart, tEnd and qName.
Click "get output".

Please don't hesitate to contact the mail list if you require further 
assistance.

Katrina Learned
UCSC Genome Bioinformatics Group



[email protected] wrote:
> Hi,
>
>   I am trying to obtain genomic coordinates of the U133 Affymetrix probeset
> target sequences.  I contacted Affymetrix and they do not provide genomic
> coordinates of target sequences for the U133 arrays.  Is there a custom
> annotation track for these coordinates on the UCSC browser?  How would I find
> out?
>
> Thanks,
> Tim
>
> _______________________________________________
> Genome maillist  -  [email protected]
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>   
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