Has antifungal activity. Inhibits spore germination and mycelia growth in F.solani (IC(50)=67.0 ug/ml), C.gloeosporioides (IC(50)=32.1 ug/ml) and a Neurospora isolate (IC(50)=57.5 ug/ml). Isoform 1. Isoform 2. On the 2D-gel the determined pI of isoform 1 is: 8.9, its MW is: 22 kDa. On the 2D-gel the determined pI of isoform 2 is: 9.1, its MW is: 22 kDa. Belongs to the thaumatin family.