UCSC updates the genome assemblies and annotations in the GBD as new releases become available, with priority given to primate and model organism assemblies and annotations that we feel are of widespread interest to GBD users, based on input from our Scientific Advisory Board and feedback received through our mailing lists and user surveys. (The results from a users’ survey conducted in May 2007 may be reviewed at: http://genome.ucsc.edu/goldenPath/help/GBsurvey507.html.) RefSeq and mRNA data from GenBank are updated daily; EST data are updated weekly.