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:1612186). Is very active against L-Phe and L-Tyr, moderately active against L-Trp, L-Met, L-Leu, L-norleucine (L-2-aminohexanoate), L-Arg and L-norvaline (L-2-aminopentanoate), and slightly active against L-His, L-cystine, and L-Ile (PubMed:1612186). L-Gln, L-Lys, L-Asn, L-ornithine, L-Ala and L-Val are oxidized very slowly (PubMed:1612186). Exhibits diverse biological activities, such as hemorrhage, hemolysis, edema, apoptosis of vascular endothelial cells or tumor cell lines, antibacterial and antiparasitic activities (By similarity). This protein inhibits both agonist- and shear stress-induced platelet aggregation (SIPA) (PubMed:11600144). Effects of snake L-amino oxidases on platelets are controversial, since they either induce aggregation or inhibit agonist-induced aggregation. These different effects are probably due to different experimental conditions. 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-arginine + O2 = 5-guanidino-2-oxopentanoate + H2O2 + NH4(+) H2O + L-2-aminohexanoate + O2 = 2-oxohexanoate + H2O2 + NH4(+) H2O + L-2-aminopentanoate + O2 = 2-oxopentanoate + H2O2 + NH4(+) H2O + L-tyrosine + O2 = 3-(4-hydroxyphenyl)pyruvate + H2O2 + NH4(+) Optimum pH is 8.5, unlike many other venom L-amino acid oxidase, is also stable in alkaline medium. Homodimer; non-covalently linked. Expressed by the venom gland. N-glycosylated. Belongs to the flavin monoamine oxidase family. FIG1 subfamily.