accession number a systematic (computer-readable) number or code that uniquely identifies an entry in a particular database. Accession numbers are assigned when entries are first added to a database and should remain static between updates, providing a reliable means of locating them in subsequent releases. For example, P02699 identifies bovine rhodopsin in the Swiss-Prot database, and IPR000276 identifies the rhodopsin-like G protein-coupled receptor superfamily in InterPro.
