3.4.21.85	Horseshoe Crab Coagulation Factor B. A unique serine protease zymogen activated by cleavage of an Ile-Ile bond	Tachypleus tridentatus	
3.4.21.85	Purification and properties of intracellular clotting factor, factor B, from horseshoe crab (Tachypleus tridentatus) hemocytes	Tachypleus tridentatus