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).
Measurement of the number of lymphocytes expressing a surface antigen recognised by R73 in a specified volume of whole blood. R73 is a monoclonal antibody that appears to be specific for a constant determinant of the rat alpha/beta heterodimeric T cell receptor.