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The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (

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Accession:XCO:0000392 term browser browse the term
Definition:A condition in which the main influencing factor is any of various compounds consisting of a purine or pyrimidine base and a sugar, usually ribose or deoxyribose, with (nucleotide) or without (nucleoside) one or more phosphate groups.

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  experimental condition 2376
    chemical 707
      chemical with specified structure 549
        nucleoside/nucleotide 0
          5-bromo-2'-deoxyuridine 0
          Adenosine triphosphate 0
          puromycin aminonucleoside 0
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