Biological Abstracts. International biology and botany abstracts, 1926-. Over 26 million abstracts.

In biology, complementary results to searches in BIOSIS Previews.

Major bibliographic database for medical literature, 1946-.

Protein sequence database known for its classified and annotated entries.

From the research Collaboratory for Structural Bioinformatics (RCSB). This database is a worldwide repository for 3D structural data on proteins.

The Chemical Abstracts database. 1907-. a comprehensive index to articles, reports, patents for all fields in chemistry.

Interdisciplinary database with coverage of some journals going back to 1823. Indexes international journals.

Finds MEDLINE citations in PubMed and uses natural language processing to extract semantic predications from titles and abstracts. The predications are used to create a drawing showing relationships between terms or concepts. A free user account must be created.

A protein sequence database providing manually annotated entries for many species, concentrating on annotation of proteins from model organisms.

(Cambridge Structural Database) Repository of small molecular crystal structures for organic molecules and metal-organic compounds whose 3D structures have been determined by x-ray diffraction and neutron diffraction.