Database

URL

Feature

GenBank [31]

http://www.ncbi.nlm.nih.gov/

NIH’s archival genetic sequence database

EMBL

http://www.ebi.ac.uk/embl/ 

EBI’s archival genetic sequence database

DDBJ

http://www.ddbj.nig.ac.jp/

NIG’s archival genetic sequence database

SGD

http://www.yeastgenome.org/

A repository for baker’s yeast genome and biological data

EBI genomes

http://www.ebi.ac.uk/genomes/

It provides access and statistics  for  the completed genomes [32]

Ensembl

http://www.ensembl.org/

Database that maintains automatic annotation on selected eukaryotic genomes [33]

UniGene

http://www.ncbi.nlm.nih.gov/sites/entrez?db=unigene

Each UniGene cluster contains sequences that represent a unique gene, as well as related information.

dbEST

http://www.ncbi.nlm.nih.gov/dbEST/

Division of GenBank that contains expression tag sequence data

Table 1: Summary of Nucleotide sequence databases.