Parameter
| Biomarker | C4 | Full name | Complement 4 | Molecular Type | Proteins (complement) |
|---|---|---|---|---|---|
| Molecular Formula | / | Molecular Weight | / | Core Functional Dimensions | Diagnosis and condition assessment |
| Disease | Autoimmune Disease (AD) | Disease Subtypes | / | ||
| Organ | Spleen, thymus, lymphoid tissue | Test Sample / Technology Platform | Serum (complement quantification) | ||
| Pathobiological Mechanisms | Complement levels reflect the degree of immune activation and consumption. | ||||
| Clinical Availability Status | Clinically applied for diagnosis/activity assessment; reduction precedes C3, 45% 3-year recurrence rate in persistent low levels | ||||
| Notes and Dynamics | Low levels correlate with disease activity; independent risk factor. | ||||