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).
A calculated measurement in which the amount of potassium atoms or ions in a specified sample of skin is divided by the dry weight of that skin sample and the result is presented as a ratio, fraction, quotient or percentage.