dbSNP is the largest polymorphism database available, including SNPs from many different organisms. dbSNP now has a new search mechanism that allows the researcher to search using HGVS nomenclature for human variation. Not only this, but the feature allows you to annotate the dbSNP rs record that you found, or if you haven’t found one, add the new information to the database. To find out more about HGVS nomenclature, you should check out these recommendations. And, as a side note to this tip, you might want to check out their list of human variation databases and resources.