Key features and details
- Sensitivity: 0.2 ng/ml
- Range: 0.234 ng/ml - 15 ng/ml
- Sample type: Cell culture supernatant, Cerebral Spinal Fluid, Milk, Plasma, Saliva, Serum, Urine
- Detection method: Colorimetric
- Assay type: Sandwich (quantitative)
- Reacts with: Human
Product nameHuman Complement C9 ELISA Kit
See all C9 kits
Intra-assay Sample n Mean SD CV% Overall 4.7% Inter-assay Sample n Mean SD CV% Overall 7%
Sample typeCell culture supernatant, Saliva, Milk, Urine, Serum, Plasma, Cerebral Spinal Fluid
Assay typeSandwich (quantitative)
Sensitivity= 0.2 ng/ml
Range0.234 ng/ml - 15 ng/ml
= 98.5 %
Assay time4h 0m
Assay durationMultiple steps standard assay
Species reactivityReacts with: Human
Abcam’s Complement C9 Human in vitro ELISA (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of C9 in Human plasma, serum, saliva, milk, urine, cerebrospinal fluid and cell culture supernatants.
A Complement C9 specific antibody has been precoated onto 96-well plates and blocked. Standards or test samples are added to the wells and subsequently a Complement C9 specific biotinylated detection antibody is added and then followed by washing with wash buffer. Streptavidin-Peroxidase Conjugate is added and unbound conjugates are washed away with wash buffer. TMB is then used to visualize Streptavidin-Peroxidase enzymatic reaction. TMB is catalyzed by Streptavidin-Peroxidase to produce a blue color product that changes into yellow after adding acidic stop solution. The density of yellow coloration is directly proportional to the amount of Complement C9 captured in plate.
The entire kit may be stored at -20°C for long term storage before reconstitution - Avoid repeated freeze-thaw cycles.
Storage instructionsStore at -20°C. Please refer to protocols.
Components 1 x 96 tests 100X Streptavidin-Peroxidase Conjugate 1 x 80µl 10X Diluent M Concentrate 1 x 30ml 20X Wash Buffer Concentrate 2 x 30ml 50X Biotinylated Human Complement C9 Antibody 1 x 120µl Chromogen Substrate 1 x 7ml Complement C9 Microplate (12 x 8 well strips) 1 unit Complement C9 Standard 2 vials Sealing Tapes 3 units Stop Solution 1 x 11ml
FunctionConstituent of the membrane attack complex (MAC) that plays a key role in the innate and adaptive immune response by forming pores in the plasma membrane of target cells. C9 is the pore-forming subunit of the MAC.
Involvement in diseaseDefects in C9 are a cause of complement component 9 deficiency (C9D) [MIM:613825]. A rare defect of the complement classical pathway associated with susceptibility to severe recurrent infections, predominantly by Neisseria gonorrhoeae or Neisseria meningitidis.
Sequence similaritiesBelongs to the complement C6/C7/C8/C9 family.
Contains 1 EGF-like domain.
Contains 1 LDL-receptor class A domain.
Contains 1 MACPF domain.
Contains 1 TSP type-1 domain.
modificationsThrombin cleaves factor C9 to produce C9a and C9b.
Phosphorylation sites are present in the extracelllular medium.
Cellular localizationSecreted. Cell membrane. Secreted as soluble monomer. Oligomerizes at target membranes, forming a pre-pore. A conformation change then leads to the formation of a 100 Angstrom diameter pore.
- Information by UniProt
- C9 deficiency
ab137972 has been referenced in 3 publications.
- Pan L et al. Label-Free Quantitative Proteomics Identifies Novel Biomarkers for Distinguishing Tuberculosis Pleural Effusion from Malignant Pleural Effusion. Proteomics Clin Appl 14:e1900001 (2020). PubMed: 31715074
- Lv LL et al. Effect of haptoglobin on the treatment of chronic hepatitis B with interferon. Exp Ther Med 18:1417-1425 (2019). PubMed: 31316628
- She S et al. C-reactive protein is a biomarker of AFP-negative HBV-related hepatocellular carcinoma. Int J Oncol 47:543-54 (2015). PubMed: 26058824