g:SNPense allows the user to easily map a list of human SNP rs-codes (e.g. rs7961894) to gene names, receive chromosomal coordinates and predicted variant effects. Mapping is enabled for such variants that overlap with at least one protein coding Ensembl gene. All underlying data are retrieved from the Ensembl Variation Data (28). The variant effects are described with color-coded set of variant consequences terms, defined by the Sequence Ontology (29). These terms convey the information about the effects that each allele of the variant may have on each gene.