PDB (Protein Data Bank): This database has sequence of those protein whose 3 -D structures are known.
Source : NCBI-U.S.A.; EBI, UK.
Blast (Basic Local Alignment Search Tool): Blast is a family of user-friendly sequence similarity search tools on the web. The Blast server is supported through NCBI (National Centre for Biotechnology Information) U.S.A. This tool is designed to identify potential homologues for a given sequence. It can analyse both DNA and protein sequences. A local alignment finds the optimal alignment between subregions or local regions of specified sequences.
