bookmark BioMart Integrates BioMart data resources with data analysis software in Bioconductor. BiomaRt can annotate a wide range of gene or gene product identifiers with information such as gene symbol, chromosomal coordinates, Gene Ontology and Online Mendelian Inheritance in Man (OMIM) annotation. Furthermore, biomaRt enables retrieval of genomic sequences and single nucleotide polymorphism information, which can be used in data analysis. Fast and up-to-date data retrieval is possible as the package executes direct SQL queries to the BioMart databases. The biomaRt package provides a tight integration of large, public or locally installed BioMart databases with data analysis in Bioconductor creating a powerful environment for biological data mining.