Protein sequence database.

The comprehensive, annotated and curated protein sequence databases – the PIR-International Protein Sequence Database and SWISS-PROT – support genome annotation, protein functional and structural analysis, proteomics, and phylogenetic studies. The databases are widely available, either free or by subscription, and are augmented by a variety of useful tools and related databases. Keywords: protein sequences; sequence databases; bioinformatics resources; protein superfamilies