| B2 protease | <enzyme> Isolated from benign strain of dichelobacter nodosus; differs from v2 protease by a single amino acid at position 219 Registry number: EC 3.4.21.- Synonym: aprb2 gene product (26 Jun 1999) |
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| b2-glycoprotein II | <enzyme> A glycine-rich, heat-labile beta-glycoprotein found in blood. It is a proactivator of complement 3 in the alternate pathway of complement activation. Factor b is converted by factor d to c3 convertase. Registry number: EC 3.4.21.47 (12 Dec 1998) |