- NCBI (The National Center for Biotechnology Information;
-> http://www.ncbi.nlm.nih.gov/ - EBI (The European Bioinformatics Institute)
-> http://www.ebi.ac.uk/ - The Canadian Bioinformatics Resource
-> http://www.cbr.nrc.ca/ - SwissProt/ExPASy (Swiss Bioinformatics Resource)
-> http://expasy.cbr.nrc.ca/sprot/ - PDB (The Protein Databank)
-> http://www.rcsb.org/PDB/