TABLE 1.

Enzyme activity (EA) index of SN-3, SN-6, and SN-20.

Strain	Diameter of hydrolysis circle (D, mm)	Diameter of lawn (d, mm)	Enzyme activity index (D/d)
SN-3	33.25	10.75	3.10
SN-6	24.80	10.16	2.44
SN-20	24.56	7.87	3.12