One-Step Ultrafiltration Process for Separation and Purification of a Keratinolytic Protease Produced with Feather Meal

Figure 1

The flux permeate during the ultrafiltration process at pH 7.0: trial 1 (♦): 10 kDa and 0.147 MPa; trial 2 (∆): 30 kDa and 0.147 MPa; trial 5 (+): 10 kDa and 0.245 MPa; trial 6 (●): 30 kDa and 0.245 MPa.