ex vivo method enzymatic method 2013-06-10T11:40:54Z A procedure or technique by which a morphological or physiological state or property in a single individual or sample or a group of individuals or samples is assessed and a quantitative or qualitative value assigned, where that procedure is based on the action of one or more enzymes, proteins that catalyze chemical reactions of other substances without themselves being destroyed or altered upon completion of the reaction(s). JSmith MMO:0000388 enzymatic analysis enzymatic assay enzyme-based analytical assay measurement_method_ontology