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 (http://rgd.mcw.edu/contact/index.shtml).
The number of splenocytes expressing CD45RA molecules (PTPRC) on their surface in a specified sample of spleen tissue. The CD45RA molecule is the long isoform of CD45 and is expressed on naive T lymphocytes.