Metalloprotease which hydrolyzes the alpha and gamma chains of fibrinogen. No activity against fibrinogen beta chains. Active against the synthetic tissue plasminogen activator substrate H-D-Ile-Pro-Arg-PNA and the synthetic plasmin substrate H-D-Val-Leu-Lys-pNA. Optimum pH is 7.0. Active at pH 4.0 to pH 9.0. Stable from pH 5.5 to pH 7.0. Optimum temperature for activity is 30 degrees Celsius. Stable below 40 degrees Celsius. Above 45 degrees Celsius the activity is sharply reduced. On the 2D-gel the determined MW is: 51 kDa.