Hi, The new Ensembl marts for release 55 are now live on www.ensembl.org and www.biomart.org. The following improvements and modifications have been made: Mart Builds (all species) Ensembl mart 55 * Addition of new species Macropus eugenii (Wallaby) * Updated the assembly for Homo sapiens (GRCh37) * C. elegans now on release 200 * Addition of probe and array information from the Functional Genomics database * Re-introduction of Gene Ontology filter section. The Ensembl mart now uses the new ensembl_ontology database instead of the ensembl_go database. * Addition of constitutive exon information * Contains new mapping for Danio rerio coreexpression ESTs Vega mart 36 * Addition of constitutive exon information Ensembl variation mart 55 New variation source filters and attributes: * Illumina CytoSNP 12 v1 * Illumina Human 1M duo V3 * Illumina Human 660W quad NEW Ensembl Functional Genomics mart 55 Contains feature set, external feature, annotated feature and regulatory feature information from the Ensembl functional genomics database. Regards, Rhoda