Trimerelysin II (EC 3.4.24.53, Trimeresurus metalloendopeptidase II, proteinase H2, H2-proteinase) is an enzyme. This enzyme catalyses the following chemical reaction Trimerelysin II (EC 3.4.24.53, Trimeresurus metalloendopeptidase II, proteinase H2, H2-proteinase) is an enzyme. This enzyme catalyses the following chemical reaction This endopeptidase is present in the venom of the habu snake (Trimeresurus flavoviridis).