3.4.21.85	?	x * 40570, calculated	665465	
3.4.21.85	dimer	1 * 32000 + 1 * 25000, Tachypleus tridentatus, SDS-PAGE under reducing conditions, 1 * 56000, Tachypleus tridentatus, SDS-PAGE under nonreducing conditions	29793	
3.4.21.85	additional information	factor B (zymogen) is a mixture of single-chain and two-chain forms: x * 64000, Tachypleus tridentatus, SDS-PAGE without 2-mercaptoethanol, x * 64000 + x * 40000 + x * 25000, Tachypleus tridentatus, SDS-PAGE after reduction with 2-mercaptoethanol	29793	
3.4.21.85	additional information	mature enzyme is composed of an amino-terminal clip-like domain and a carboxyl-terminal serine protease domain homologous to that of human plasma prekallikrein	665465