1) Enzyme 
Synonym for amine oxidase ... <enzyme> A group of enzymes including those oxidizing primary monoamines, diamines, and histamine. ... They are copper proteins, and, as their action depends on a carbonyl group, they are sensitive to inhibition by semicarbazide. ... Chemical name: Amine:oxygen oxidoreductase (deaminating)(copper-containing) ... ...
(his-tam´ĭ-nās) an enzyme that inactivates histamine.
Type: Term Pronunciation: his-tam′i-nās Synonyms: amine oxidase1
[n] - enzyme that acts as a catalyst in converting histidine to histamine
histaminase An enzyme widely distributed in the body that inactivates histamine.
an enzyme that catalyzes the decomposition of histamine, used in treating allergies.