properdin factor B

pro·per·din fac·tor B

[MIM*138470]
a normal serum protein (MW 95,000) and a component of the properdin system, which combines with C3b to form the C3 convertase of the alternative pathway.

pro·per·din fac·tor B

(prō'pĕr-din fak'tŏr)
A normal serum protein and a component of the properdin system.