Dear biomaRt users, Tomorrow the Ensembl BioMart database will fix it's current Ensembl 47 release with the following attribute/filter name changes involving gene symbols. * For the hsapiens_gene_ensembl (human) dataset you'll need hgnc_symbol as attribute and filter name to use/retrieve gene symbols. * For the mmusculus_ensembl_gene (mouse) dataset you'll need the mgi_symbol as attribute and filter name (this was markersymbol in previous versions). * For the drerio_gene_ensembl (zebrafish) dataset you'll need zfin_symbol to use/retrieve gene symbols. Note: These names for attributes and filters that refer to gene symbols have been subject to changes in the recent months but now Ensembl has promised to keep them stable from now. Cheers, Steffen