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:16307769). Shows activity on L-Leu (PubMed:16307769). Exhibits diverse biological activities, such as apoptosis, antibacterial activities against both Gram-negative and Gram-positive bacteria and antiparasitic activities, as well as induction of platelet aggregation (PubMed:16307769). Effects of snake L-amino oxidases on platelets are controversial, since they either induce aggregation or inhibit agonist-induced aggregation (By similarity). These different effects are probably due to different experimental conditions (By similarity). This protein may also induce hemorrhage, hemolysis, and edema (By similarity). an L-alpha-amino acid + H2O + O2 = a 2-oxocarboxylate + H2O2 + NH4(+) H2O + L-leucine + O2 = 4-methyl-2-oxopentanoate + H2O2 + NH4(+) Optimum pH is 6.5. Homodimer; non-covalently linked. Expressed by the venom gland. N-glycosylated. Has parasiticidal activities against leishmania, as a result of enzyme-catalyzed hydrogen peroxide production. Belongs to the flavin monoamine oxidase family. FIG1 subfamily.