Dear Mitchell,
Thank you for your message and using the UCSC Genome Browser to build track hubs.
We also received your message asking to disregard this question, and we are glad that you have resolved the issue. For other users that may be searching for this question in the future, we would like to go ahead and post details to a solution for their future reference.
Here is a temporary small hub that illustrates adding a 13th column and using that column to build a URL to an external site that might be of interest. Here is a link to the trackDb.txt
If you click this item you will see there is now a displayed link to MGI ID for item.
This was done by adding a 13th column to some bed data (where since the exact mapping was unknown 1336189 was added for all items), for example like this:
chrX 160768013 160799663 NM_011302_Rs1<tmgc1>_induced 0 + 160768013 160799663 0 6 224,25,105,141,195,5144, 0,11345,13792,22761,23379,26506, 1336189
This bed was made into a bigBed with this autosql definition file where I added an additional column called MGI_ID:
Built into a bigBed with this command:
Then in the trackDb.txt this additional urls line was added (but if there were multiple additional columns, many URLs could be built):
There is also a link at the top in these detail pages that uses the "name" field in the bed that is made into a link with this trackDb.txt line:
You can add many additional columns and add many additional links if you desire to your data. There are also other options to add searchIndexes on the names and searchTrix files that further allow increased search options if desired.
You can learn more about the url, urls, searchIndex and searchTrix fields here:
Thank you again for your inquiry and using the UCSC Genome Browser. If you have any further questions, please reply to
gen...@soe.ucsc.edu. All messages sent to that address are archived on a publicly-accessible forum. If your question includes sensitive data, you may send it instead to
genom...@soe.ucsc.edu.
All the best,
Brian Lee
UC Santa Cruz Genomics Institute