Biochemistry

A comprehensive searchable database of enzymes, BRENDA is maintained by the Institute of Biochemistry at the University of Cologne. Scientists collect and evaluate enzyme functional data from primary sources. Links to literature citations, images, and other databases.

Provides freely available data and bioinformatics services to all facets of the scientific community, it contains 2-D structures, calculated properties (e.g. logP, Molecular Weight, Lipinski Parameters, etc.) and abstracted bioactivities (e.g. binding constants, pharmacology and ADMET data).

A free web search system that provides access to the structure and nomenclature authority files used for the identification of chemical substances. Search capabilities include simplified Name and RN searching, chemical structure, toxicity, physical property, molecular formula, classification code, and locator code searching.

A worldwide repository on the 3D structures of large biological molecules (proteins, nucleic acids, etc.). Searchable for sequence, structure, and function from sets derived from X-ray crystallography, NMR, electron microscopy, and more.

Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.

Search engine for chemists and biologists. Allows for search by name, CAS number, AKos number, InChI, or any identifier.

A freely accessible database of chemicals. Contains substances with their synthesis references and physical properties such as melting point, boiling point and density.