Increased endogenous NO levels, achieved through various means like arginase inhibition, arginine addition, or NOS induction by interferons (not shown), as well as the inhibition of NO dioxygenase (NOD) by compounds including anthocyanidins, flavonoids, antifungal azoles, diallyldisulfide, artemisinine, and taxol, lead to localized reversible catalase inhibition on tumor cell surfaces [104]. Here, CAT is linked to neoplasm.