complement factor Imedical dictionary

<enzyme>

<cell biology> Serine proteinase that acts on ic3b (inactivated complement 3b) to cleave it into c3c and c3dg with the help of a trypsin-like proteolytic enzyme. Complement factor I was formerly called kaf, c3binf, or enzyme 3b inactivator.

Registry number: EC 3.4.21.45

(12 Dec 1998)