Figure 4: Protease activity (U = μg tyrosine liberated · mL-1l of enzyme extract per min) exhibited in different strains (1, rf3; 2, rf6; 3, mf1; 4, mf6; 5, of3; 6, of5; 7, hf5; 8, ff2; 9, ff3; 10,ff4; 11, ff5; 12, af1; 13, af4; 14, cf3; 15, cf4 ;) isolated from all the experimental diets respectively. rf from Diet 1, mf from Diet 2, of from Diet 3, hf from Diet 4, ff from Diet 5, af from Diet 6 and cf from Control.