sequnece databases

DNA and protein sequence databases are the fundamental resources for bioinformatics research, development and application.

GenBank - The web portal to the NIH genetic sequence database maintained by NCBI, also a part of the International Nucleotide Database Collaboration. Literature citation, release notes and an example record can be found in this page.
EMBL - The web portal to EMBL nucleotide sequence database maintained by EBI, also a part of the International Nucleotide Database Collaboration. Various documentations such as release notes, database statistics, user guide, feature table definition and sample entry and FAQs are provided.
RefSeq - The Reference Sequence collection constructed by NCBI to provide a comprehensive, integrated, non-redundant set of DNA, RNA sequences and protein products. It provides a stable reference for genome annotation, gene identification and characterization, mutation and polymorphism analysis, expression studies and comparative analyses.
UniGene - An Organized View of the Transcriptome created by NCBI. Each UniGene entry is a set of transcript sequences that appear to come from the same transcription locus, together with information on protein similarities, gene expression, cDNA clone reagents, and genomic location.
dbSNP - The database of single nucleotide polymorphism maintained by NCBI.
EMBLCDS - a database of nucleotide sequences of the coding sequence from EMBL.

Swiss-Prot - The entry site for the well annotated protein sequence knowledge database maintained by SIB at Geneva, Switzerland. A list of references, a comprehensive user manual, and database statistics with tables and flowcharts are provided.
UniProt - The main web site for international protein sequence database which consists of the protein knowledgebase (UniProtKB), the sequence clusters (UniRef) and the sequence archive (UniParc).
HPI - The Human Proteomics Initiative, an EBI project to annotate all known human sequences according to the quality standards of UniProtKB/Swiss-Prot. It provides for each known protein, a wealth of information that include the description of its function, its domain structure, subcellular location, post-translational modifications, variants, similarities to other proteins, etc.
IPI - The web site of the International Protein Index database which provides a top level guide to the main databases that describe the proteomes of higher eukaryotic organisms.

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