Hi zhangpeng, >>the relationship between expIds and tissues
You can get a list of this relation by going to our table browser: http://genome.ucsc.edu/cgi-bin/hgTables Select... Your assembly ... hg18?, then... group: Expression track: GNF Atlas 2 table: gnfAtlas2 region: genome output format: Microarray Names Then click: get output You'll see the list of expIds/tissue types. >>how can I identify overexpression/underexpression through the expscore In short, negative expScore values denote underexpression, and positive values over expression (more extreme values denoting more extreme over/under expression). If you go to hg18 in the genome browser (http://genome.ucsc.edu/cgi-bin/hgGateway), find the gnfAtlas2 track under "Expression" and set it to "full" (then click refresh), it will display expression data for the various dissues using red and green bars. Click on one of the bars and you'll be taken to a details page that will show a graph of the range of under/over expression values and their corresponding colors. This might help in making sense of the scores. You may also find this page in our WIki useful: http://genomewiki.ucsc.edu/index.php/Microarray_track - Greg Roe UCSC Genome Browser Group On 2/12/11 12:29 AM, zhangpeng2 wrote: > Dear editor: > > I'm studying the data of expression data from ucsc. and I have two > quetions about it. > The first is how can I identify the relationship between expIds and > tissues. The second question is how can I identify > overexpression/underexpression through the expscore > > 2011-02-12 > > > > All my best > zhangpeng > _______________________________________________ > Genome maillist - [email protected] > https://lists.soe.ucsc.edu/mailman/listinfo/genome _______________________________________________ Genome maillist - [email protected] https://lists.soe.ucsc.edu/mailman/listinfo/genome
