This ELISA kit provides quantitative measurement of Complement 7 (C7) in human samples, supporting research into the membrane attack complex (MAC) and terminal complement pathway activation. Because C7 circulates at microgram-per-milliliter concentrations in healthy serum but shifts meaningfully during complement consumption or deficiency states, this kit is designed to capture both baseline and depleted levels with appropriate sample dilution.
Detection Range: The 4.69–300 ng/mL range requires dilution of serum and plasma samples, where normal C7 levels typically fall between 50–100 µg/mL. This built-in dilution step effectively minimizes matrix interference while still capturing the reduced C7 concentrations seen in complement consumption during bacteremia or immune complex disease.
Sensitivity: At 2.345 ng/mL, the kit detects C7 in diluted serum from individuals with hereditary C7 deficiency or in tissue homogenates where local complement production yields substantially lower concentrations than systemic circulation.
Sample Compatibility: Validation across serum, plasma, and tissue homogenates enables researchers to correlate systemic C7 levels with local hepatic or extrahepatic C7 expression, critical for studying tissue-specific complement biosynthesis.
Assay Efficiency: The 1–5 hour protocol and 50–100 µL sample volume accommodate longitudinal clinical cohort studies where serial blood draws and high-throughput plate processing are essential.
This kit is particularly suited for investigating meningococcal susceptibility in C7-deficient individuals, MAC-driven tissue injury, and complement biomarker profiling in systemic lupus erythematosus.