PubMed PubMed Large bibliographic database of biological and medical literature, with links to large molecular biological databases, including data on genes, proteins, and pathways.
European Bioinformatics Institute Array of databases comprising data on nucleotides, proteins, pathways, taxonomy, and also analytical tools.
Protein Data Bank The Research Collaboratory for Structural Bioinformatics's database of protein structures.
ExPASy European array of protein and genetics databases.
BRENDA Enzyme database.
Databib list of biological databases
Encyclopedia of Life Community assembled and curated taxonomically-based encyclopedia of life.
Gene Ontology Controlled vocabulary for genetics.
Biological Ontology Databases At European Bioinformatics Institute.
Open Biomedical Ontologies Foundry Additional ontologies.
Ecological Classication System By NatureServe organization.