Figure 4.
Auto-activation of Ov-APR-1 from a pro-enzyme to its mature form at acidic pH. Recombinant Ov-APR-1 (pro-enzyme) was incubated in 50 mM sodium acetate at half-unit pH increments from pH 2–5 at 37°C for 18 h. C – control Ov-APR-1 protein in PBS, pH 7.2; 2.0 – 5.0 - pH values at which Ov-APR-1 was incubated to observe auto-activation from pro- (upper band) to mature form (lower band).