Production, Optimization, and Characterization of an Acid Protease from a Filamentous Fungus by Solid-State Fermentation

Table 2

Acid protease activity of fungal isolates under SSF.

No.	Isolates	Adjusted spore concentration/mL	PA (U/mL), mean ± SEM
1	Z1BL4	3.6 × 10^6	54.9 ± 1.7^a
2	H1Gr1	1.3 × 10^6	38.8 ± 2.2^b
3	Z1BL1	3.2 × 10^6	78.2 ± 1.5^a
4	Z1BL3	3.1 × 10^6	49.2 ± 1.7^ab
5	SW2W1	2.2 × 10^6	70.1 ± 2.8^a
6	H1BL1	1.8 × 10^6	46.6 ± 4.0^b
7	Z1Y2	1.5 × 10^6	31.7 ± 1.7^b
8	H1W1	1.2 × 10^6	47.2 ± 2.8^ab
9	SW1WY1	2.0 × 10^6	51.7 ± 1.7^ab

Mean is the average of three measurements. SEM: standard error of the mean; PA: protease activity. Different letters (a, b) designate significantly different means as determined by the SPSS test .