C1 is controlled by?
Correct Answer: Calcium
Description: The initial enzyme, Cl, is a complex formed through a calcium-dependent association between two reversibly interacting subunits, Clq and Clr2s2.
In the absence of an immune response, approximately 70% of Cl exists as a complex between these two subunits.
Cl occurs in serum as a proenzyme that tends to undergo autoactivation (in which the two subunits are bound together) but is strictly controlled by Cl-inhibitor (Cl-In or Cl esterase).
Category:
Pathology
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