Armour Unit

**Semantic type:** Quantitative Concept

**Definition:** A unit of proteolytic activity for trypsin and/or chymotrypsin that, upon incubation with the hemoglobin substrate, will release a quantity of phenolic substances that react with Folin-Ciocalteu phenol reagent to produce a colorimetric change of equal intensity to that produced from the reaction of one microgram of tyrosine with Folin-Ciocalteau phenol reagent.

**Synonyms:** - ARMOUR UNIT - AU - {ARMOUR UNIT} - {ARMOUR UNIT} - {AU} - {AU}