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CHEBI ONTOLOGY - ANNOTATIONS

The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/by/3.0/). For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.

Term:pyrimidine nucleobase
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Accession:CHEBI:26432 term browser browse the term
Definition:A nucleobase whose skeleton is derived from pyrimidine.
Synonyms:related_synonym: Formula=C4HN2R4;   SMILES=N1C(=C(C(=NC1=*)*)*)*;   a pyrimidine nucleobase;   pyrimidine bases;   pyrimidine nucleobases


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  • Term paths to the root
    Path 1
    Term Annotations click to browse term
      CHEBI ontology 19821
        chemical entity 19821
          atom 19819
            nonmetal atom 19707
              nitrogen atom 18765
                nitrogen molecular entity 18765
                  organonitrogen compound 18538
                    organonitrogen heterocyclic compound 17643
                      nucleobase 10285
                        pyrimidine nucleobase 6220
                          2-amino-4-hydroxypyrimidine + 0
                          alpha-putrescinylthymine 0
                          cytosine + 1135
                          pyrimidine 2'-deoxyribonucleoside 5'-phosphate(2-) + 0
                          thymine + 70
                          uracil + 5677
    Path 2
    Term Annotations click to browse term
      CHEBI ontology 19821
        subatomic particle 19819
          composite particle 19819
            hadron 19819
              baryon 19819
                nucleon 19819
                  atomic nucleus 19819
                    atom 19819
                      main group element atom 19716
                        p-block element atom 19716
                          carbon group element atom 19640
                            carbon atom 19630
                              organic molecular entity 19630
                                organic molecule 19569
                                  organic cyclic compound 19360
                                    organic heterocyclic compound 18591
                                      organic heteromonocyclic compound 17084
                                        diazines 12328
                                          pyrimidines 12157
                                            pyrimidine nucleobase 6220
                                              2-amino-4-hydroxypyrimidine + 0
                                              alpha-putrescinylthymine 0
                                              cytosine + 1135
                                              pyrimidine 2'-deoxyribonucleoside 5'-phosphate(2-) + 0
                                              thymine + 70
                                              uracil + 5677
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