Thanks, I'll re-do the conversions using the BED format.

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Jorja Henikoff                                     [email protected]
Fred Hutchinson Cancer Research Center             FAX: 206-667-5889
1100 Fairview AV N, A1-162, PO Box 19024           Seattle, WA 98109-1024
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On Tue, 22 Sep 2009, Brooke Rhead wrote:

> Hello Jorja,
>
> I have two suggestions for you that might solve this problem.  The first is 
> to use BED formatted positions as input:
>
> http://genome.ucsc.edu/FAQ/FAQformat#format1
>
> The probe IDs will be retained in the 4th field, "name".
>
> The second suggestion is to also look at the "Display failure file" link 
> (under the "View Conversions" link) to see the probes that did not lift to 
> mm9 successfully.
>
> If you still have questions/comments for us, please feel free to contact us 
> again at [email protected].
>
> --
> Brooke Rhead
> UCSC Genome Bioinformatics Group
>
>
> On 09/22/09 15:35, Jorja Henikoff wrote:
>>  Hello, I am using your useful liftOver tool
>>  (http://genome.ucsc.edu/cgi-bin/hgLiftOver) to convert the locations of
>>  2.1m probes on a NimbleGen array from mouse mm8 to mm9. It works fine
>>  except for one thing. Because I have to strip the probe id off the
>>  file before I submit the positions, I can't tell what probes were not
>>  remapped. For instance, I have 122,701 probes on chr9 but only 122,686
>>  were mapped to mm9 so now I have to somehow figure out which ones
>>  weren't. FlyBase has a similar tool which always returns the same
>>  number of locations as input, returning "chr9:?-?" when it can't
>>  map a location, making this task easier.
>>
>>  -------------------------------------------------------------------------
>>  Jorja Henikoff                                     [email protected]
>>  Fred Hutchinson Cancer Research Center             FAX: 206-667-5889
>>  1100 Fairview AV N, A1-162, PO Box 19024           Seattle, WA 98109-1024
>>  -------------------------------------------------------------------------
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