A glycine-rich, heat-labile serum glycoprotein that contains a component of the C3 CONVERTASE ALTERNATE PATHWAY (C3bBb). Bb, a serine protease, is generated when factor B is cleaved by COMPLEMENT FACTOR D into Ba and Bb.
Also Known As:
Factor B; Factor B, Complement; Bb Fragment of Factor B; Complement Factor B Fragment, Bb; Complement Factor B, Alternative Pathway; Complement Factor B-Derived Fragment Bb; Complement Factor Ba; Complement Factor Bb; Complement Protein B; Complement Protein Factor B; Properdin Factor Ba; Properdin Factor Bb; Properdin Factor Bf; Properdin Factor Bf F1; Bb, Complement Factor; Complement Factor B Derived Fragment Bb; Factor B, Properdin; Factor Ba, Complement; Factor Ba, Properdin; Factor Bb, Complement; Factor Bb, Properdin; Factor Bf, Properdin; Proactivator, C3; Proactivator, Complement 3; Protein B, Complement; C3 Proactivator; C3PA; Complement 3 Proactivator; Properdin Factor B