calculated apoptotic cell measurement TUNEL-positive cell number to total cell number ratio 2012-09-12T05:43:33Z A calculated measurement in which the number of cells in a specified sample that stain positively in the terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay (i.e. in which the DNA is fragmented and therefore is labeled by the terminal transferase, a marker of apoptosis) is divided by the total number of cells in the sample, and presented as a ratio, fraction, quotient or percentage. CMO:0001098 JSmith VT:0003887 clinical_measurement_ontology number of TUNEL-positivecells as percentage of total number of cells number of apoptotic cells as percentage of total number of cells