1 INTRODUCTION The Ensembl (Flicek et al., 2010) and UCSC (Fujita et al., 2010) genome browsers are the first point of call for a large community of genetics and genomics researchers. Both provide a graphical interface for browsing the genomes of a large number of species, displaying the location of genes, polymorphisms, repeats and regulatory regions. Each database can also be accessed directly v
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