Catalyzes an oxidative deamination of predominantly hydrophobic and aromatic L-amino acids, thus producing hydrogen peroxide that may contribute to the diverse toxic effects of this enzyme (PubMed:21802487). Is highly active on L-Tyr followed by L-Phe, L-Met, L-Leu, L-Trp, and weakly active on L-Ile, L-Arg, L-Val, L-Lys, and L-Ala (PubMed:21802487). Inhibits ADP- and collagen-induced platelet aggregation (PubMed:21802487). This inhibition is inhibited by catalase, indicating the importance of generated H(2)O(2) for the inhibitory effect (PubMed:21802487). This effect on platelets among snake L-amino-acid oxidases is however controversial, since some of them induce aggregation, whereas the other inhibit agonist-induced aggregation (By similarity). In vivo, this enzyme induces a rapid, substantial and reversible increase in the paw volume of mice (edema) (PubMed:21802487). In addition, myofibrosis, and inflammatory cell infiltration on the paw tissue are also observed (PubMed:21802487). an L-alpha-amino acid + H2O + O2 = a 2-oxocarboxylate + H2O2 + NH4(+) H2O + L-leucine + O2 = 4-methyl-2-oxopentanoate + H2O2 + NH4(+) H2O + L-phenylalanine + O2 = 3-phenylpyruvate + H2O2 + NH4(+) H2O + L-tryptophan + O2 = H2O2 + indole-3-pyruvate + NH4(+) H2O + L-methionine + O2 = 4-methylsulfanyl-2-oxobutanoate + H2O2 + NH4(+) H2O + L-tyrosine + O2 = 3-(4-hydroxyphenyl)pyruvate + H2O2 + NH4(+) Homodimer; non-covalently linked. Expressed by the venom gland. Does not induce dermal hemorrhage when subcutaneously injected into mice at the dose of 40 ug. Belongs to the flavin monoamine oxidase family. FIG1 subfamily.