ChEBI
ChEBI ( Ch emical E ntities of B iological I nterest ) is a free encyclopedia of molecular entities with a focus on chemical compounds in metabolism occur beings. The term 'molecular entities' refers to any type of atom , molecule , ion , ion pair, radical, complex, conformation, etc.
ChEBI also offers an ontology with which the complex classification of chemical compounds can be illustrated using a tree structure.
The nomenclature , terminology and symbols used in ChEBI correspond to international standards and are recommended by the following committees:
- International Union of Pure and Applied Chemistry (IUPAC)
- Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (NC-IUBMB)
Molecules that are coded directly by the genome (e.g. nucleic acids , proteins and peptides resulting from cleavage ) are generally not included in the ChEBI database .
All data stored at ChEBI are neither proprietary nor were they obtained from a proprietary source. This guarantees free access to the data. In addition, each data element can be traced back to its original source.