SWISS-PROT (established 1986) is a protein sequence database, accessible from the Swiss EMBL Outstation, EXPASY.
SWISS-PROT excels in annotation, exhibits very little redundancy and is thoroughly integrated with other databses. The extensive annotation and exhaustive to reduce redundancy mean that entries can take time before they are made available, but when they are, they are a complete and thorough resource. Annotation is updated with information from published review articles, and by external expert referees.
 
The entries are similar in layout to EMBL entries, with similar two letter codes defining the contents of each line. These include CC (comment), FT (feature table) and KW (keywords). Annotation includes information about the protein's function, post-translational modifications, disease associated deficiency, domains, structure and more. Where applicable, SWISS-PROT entries are cross referenced with PDB, a database of experimentally determined protein structure. Three dimensional (3D) models can be viewed with most web browsers, or files can be downloaded for local viewing.
SWISS-PROT + TrEMBL
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