How do I download data using the UCSC DAS server?
Response: The UCSC DAS server provides access to genome annotation data for all current assemblies featured in the Genome Browser. To view a list of the assemblies available from the DAS server and their base URLs, see http://genome.ucsc.edu/cgi-bin/das/dsn. To construct a DAS query, combine an assembly’s base URL with the sequence entry point and type specifiers available for that assembly. The entry point specifies chromosome position, and the type indicates the annotation table requested.