Den fjärde komponenten som binds i komplementreaktionsföljden. Det är ett betaglobulin med sedimentationskoefficient 5,5, molekylvikt 185 000 och en serumkoncentration på 1,3 mikrogram/ml. Dess fragment har anafylatoxisk, kemotaktisk och histaminverkan och påverkar glatt muskulatur.
A glycoprotein that is central in both the classical and the alternative pathway of COMPLEMENT ACTIVATION. C3 can be cleaved into COMPLEMENT C3A and COMPLEMENT C3B, spontaneously at low level or by C3 CONVERTASE at high level. The smaller fragment C3a is an ANAPHYLATOXIN and mediator of local inflammatory process. The larger fragment C3b binds with C3 convertase to form C5 convertase.
Inga svenska synonymer finns.
C3, Complement — Complement 3 — Complement Component 3 — Component 3, Complement — C3 Complement — Complement, C3 — Complement C3 Precursor — C3 Precursor, Complement — Precursor, Complement C3 — Pro-C3 — Pro C3 — Precursor-Complement 3 — Precursor Complement 3 — Pro-Complement 3 — Pro Complement 3 — C3 Precursor — Precursor, C3