Suppress hemorrhage induced by metalloproteinases from the same venom (brevilysin-H3, -H4, -H6) and from habu venom (metalloproteinases HR1A and HR1B). The non-hemorrhagic brevilysin-L4 is not inhibited by cMSF. Does not inhibit serine and cysteine proteases such as trypsin, chymotrypsin, thermolysin, and papain. The inhibition may occur by formation of a non-covalent complex between this protein and the proteinases at their metalloproteinase domains. Homodimer. Expressed by the liver. Belongs to the fetuin family.