In 1997, the Korean group of Ahn et al. [79] published an interesting study investigating the LAAO from Ophiophagus hannah, starting from its purification, biochemical characterization up to its cytotoxic activity upon several tumor cell cultures, both human and murine, achieving around 74% of inhibition of tumor proliferation at a concentration of 2 μg/mL. The gene discussed is IL4I1; the disease is neoplasm.