2005, GPCRIPDB.
This query system allow you to quickly and easily find your favorite protein. You can enter either Swiss-Prot identifier (ID) (or a part of) or accession codes (ACs), or any text in the second text box. You can restrict your search by selecting options.
Each hit will bring you to a GPCRIPDB cross-reference entry that allows for navigation within the GPCRIPDB (family page, cDNAs, ...) or to remote databases.