Hello Hongxin,
Unfortunately this is beyond the scope of this mailing list - which
is to address specific questions about the UCSC Genome Browser
software, database, genome assemblies and release cycles.
You might want to consult the "support" section of the GMOD site:
http://gmod.org/wiki/Main_Page
Best of luck with your research,
Pauline Fujita
UCSC Genome Bioinformatics Group
http://genome.ucsc.edu
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