A track data hub may be shared with others by providing the URL of the hub.txt file needed to load the hub. Hubs of general interest to the research community can be registered at UCSC for sharing on the Genome Browser Web site by contacting the browser technical support mailing list at genome@soe.ucsc.edu (include the URL of the hub.txt file in the message). Links to registered shared hubs may be found on the ‘Public Hubs’ tab on the Genome Browser track data hubs web page (http://genome.ucsc.edu/cgi-bin/hgHubConnect).