Has antifungal activity against B.cinerea, C.comatus, M.arachidicola, P.piricola, C.albicans and S.carlsbergensis. Inhibits HIV-1 reverse transcriptase. N-glycosylated. Causes an allergic reaction in human. Binds to IgE from the serum of kiwi-allergic patients. Belongs to the thaumatin family.