Complement C3 Antibody (11H9) - BSA Free


Biological Strategies: Flow (Intracellular): Complement C3 Antibody (11H9) [NB200-540] - An intracellular stain was performed on RAW 246.7 cells with Complement C3 (11H9-3-2) antibody NB200-540 (blue) and a more
Immunocytochemistry/ Immunofluorescence: Complement C3 Antibody (11H9) [NB200-540] - C3 protein fragments deposited on kidney cells of MPL-lpr mouse. Staining with antibody 11H9. Glomerular staining pattern. Fixation in more
Immunohistochemistry-Paraffin: Complement C3 Antibody (11H9) [NB200-540] - Complement C3 protein in a FFPE tissue section of mouse liver using 1:100 dilution of Complement C3 antibody (clone 11H9) NB200-540. Weak but more
Flow Cytometry: Complement C3 Antibody (11H9) [NB200-540] - Left panel: FMO, Middle panel: No primary antibody control, Right panel: sample. Day 6 murine mammary tumors processed and stained for analysis with flow more
Immunohistochemistry-Paraffin: Complement C3 Antibody (11H9) [NB200-540] - Complement C3 protein in a FFPE tissue section of mouse lymph node using 1:100 dilution of Complement C3 antibody (clone 11H9) NB200-540. This more

Product Details

Reactivity Mu, EcSpecies Glossary
Applications ELISA, Flow, ICC/IF, IHC, IP, CyTOF-ready
BSA Free
1.0 mg/ml
Validated by:

Biological Strategies


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Complement C3 Antibody (11H9) - BSA Free Summary

This Complement C3 Antibody (11H9) was developed against C57BL/6 thymocytes saturated with rat anti-Thy-1 monoclonal antibody of IgG2b subclass (RmT1).
Mouse Complement C3 and its activation products, C3b, iC3b, C3d and C3dg
Protein G purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.


  • CyTOF-ready
  • Flow (Intracellular) 1 ug/ml
  • Flow Cytometry 1 ug/ml
  • Immunoassay 0.5 ug/well in PBS
  • Immunocytochemistry/ Immunofluorescence 1:10-1:500
  • Immunohistochemistry 1:10-1:500
  • Immunohistochemistry-Frozen 1:10-1:500
  • Immunohistochemistry-Paraffin 1:200
  • Immunoprecipitation 1:10-1:500
Theoretical MW
187 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Reviewed Applications
Read 2 Reviews rated 4.5
NB200-540 in the following applications:

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NB200-540 in the following applications:

Reactivity Notes

Use in Mouse reported in scientific literature (PMID:34433493). Use in E. coli reported in scientific literature (PMID:32422907).

Packaging, Storage & Formulations

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.
0.02% Sodium Azide
1.0 mg/ml
Protein G purified

Alternate Names for Complement C3 Antibody (11H9) - BSA Free

  • Acylation Stimulating Protein
  • acylation-stimulating protein cleavage product
  • AHUS5
  • ARMD9
  • ASP
  • C3 and PZP-like alpha-2-macroglobulin domain-containing protein 1
  • C3
  • C3a anaphylatoxin
  • C3a
  • C3adesArg
  • C3b
  • C3bc
  • C3-beta-c
  • Complement C3 alpha chain
  • Complement C3 beta chain
  • complement C3
  • Complement C3b alpha' chain
  • Complement C3c alpha' chain fragment 1
  • Complement C3c alpha' chain fragment 2
  • Complement C3d fragment
  • Complement C3dg fragment
  • Complement C3f fragment
  • Complement C3g fragment
  • complement component 3
  • complement component C3
  • complement component C3a
  • complement component C3b
  • CPAMD1
  • EC
  • epididymis secretory sperm binding protein Li 62p
  • HEL-S-62p
  • prepro-C3


The complement system, or complement cascade, is a part of the innate immune system that assists in defense against pathogens (1-3). Complement C3, also called C3 or C3 protein, is one of nine complement proteins and is the main component of the complement system which is composed of over 30 soluble and membrane-bound proteins (1,4). The complement cascade consists of three main pathways: the classical, the lectin, and the alternative, all of which converge into a common pathway involving C3 cleavage by C3-convertases (1-6). Human Complement C3 is synthesized as a protein of 1663 amino acids (aa) in length with a theoretical molecular weight of ~185 kDa (5). Complement C3 is the most prevalent human complement protein in the serum, with a concentration of 1.2 mg/mL, and is predominantly produced by hepatocytes in the liver, but is also synthesized by blood cells and epithelial cells (3,5). Furthermore, the structure of C3 is comprised of an alpha-chain (110 kDa) and a beta-chain (75 kDa) linked by a disulfide bond (5). Cleavage of inactive C3 by C3-convertases produces active C3a, which functions as a mediator of inflammation, and C3b, which is an opsonin (1-4). In addition to amplification of complement response, C3 fragments serve multiple additional functions including chemotaxis, phagocytosis, adhesion, and immune modulation (3). Complement C3 serves dual purposes where it is involved in pathogenesis and immunity but, conversely, cellular damage results from unregulated C3 activation (5).

Both elevated levels and reduced levels of Complement C3 has been implicated in diseases pathologies (6). Deficiency in Complement proteins can result in autoimmune disorders including systemic lupus erythematosus, which is more often associated with C1 or C4 deficiency and only rarely with C3 deficiency (6). However, C3 deficiency typically results in increased risk of recurrent bacterial infections and glomerulonephritis, characterized by inflammation of the filtering glomeruli in the kidneys (6). Additionally, elevated levels of C3a and C4a is seen in patients with antiphospholipid antibody syndrome (6). Serum levels of C3 are also higher in rheumatoid arthritis cases (6). The complement system has become a target for drugs and therapeutics aimed at modulating innate immunity (7). For instance, compstatin is a peptide that binds to C3, inhibiting convertase activity and cleavage and can be used to treat diseases associated with uncontrolled C3 activation (7). C3-inhibitors and other complement inhibitors are a promising drug candidate for treatment of many diseases (7).


1. Mathern, D. R., & Heeger, P. S. (2015). Molecules Great and Small: The Complement System. Clinical Journal of the American Society of Nephrology: CJASN.

2. Merle, N. S., Church, S. E., Fremeaux-Bacchi, V., & Roumenina, L. T. (2015). Complement System Part I - Molecular Mechanisms of Activation and Regulation. Frontiers in Immunology.

3. Ricklin, D., Reis, E. S., Mastellos, D. C., Gros, P., & Lambris, J. D. (2016). Complement component C3 - The "Swiss Army Knife" of innate immunity and host defense. Immunological Reviews.

4. Merle, N. S., Noe, R., Halbwachs-Mecarelli, L., Fremeaux-Bacchi, V., & Roumenina, L. T. (2015). Complement System Part II: Role in Immunity. Frontiers in Immunology.

5. Sahu, A., & Lambris, J. D. (2001). Structure and biology of complement protein C3, a connecting link between innate and acquired immunity. Immunological Reviews.

6. Vignesh, P., Rawat, A., Sharma, M., & Singh, S. (2017). Complement in autoimmune diseases. Clinica Chimica Acta; International Journal of Clinical Chemistry.

7. Mastellos, D. C., Yancopoulou, D., Kokkinos, P., Huber-Lang, M., Hajishengallis, G., Biglarnia, A. R., Lupu, F., Nilsson, B., Risitano, A. M., Ricklin, D., & Lambris, J. D. (2015). Compstatin: a C3-targeted complement inhibitor reaching its prime for bedside intervention. European Journal of Clinical Investigation.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Publications for Complement C3 Antibody (NB200-540)(30)

We have publications tested in 2 confirmed species: Mouse, E. coli.

We have publications tested in 8 applications: ELISA, FLOW, ICC/IF, IF/IHC, IHC-Fr, IP, In Vivo, WB.

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Showing Publications 1 - 10 of 30. Show All 30 Publications.
Publications using NB200-540 Applications Species
Uapinyoying P, Hogarth M, Battacharya S et al. Single-cell transcriptomic analysis of the identity and function of fibro/adipogenic progenitors in healthy and dystrophic muscle iScience 2023-08-18 [PMID: 37599828]
Engavale M, Hernandez CJ, Infante A et al. Deficiency of macrophage-derived Dnase1L3 causes lupus-like phenotypes in mice bioRxiv : the preprint server for biology 2023-04-18 [PMID: 37131692] (IHC-Fr, Mouse) IHC-Fr Mouse
Khazaei S, Chen CCL, Andrade AF et al. Single substitution in H3.3G34 alters DNMT3A recruitment to cause progressive neurodegeneration Cell 2023-03-16 [PMID: 36931244]
Stym-Popper G, Matta K, Chaigneau T et al. Regulatory T cells decrease C3-positive reactive astrocytes in Alzheimer-like pathology Journal of neuroinflammation 2023-03-08 [PMID: 36890536] (IHC-Fr, Mouse) IHC-Fr Mouse
Linde IL, Prestwood TR, Qiu J et al. Neutrophil-activating therapy for the treatment of cancer Cancer cell 2023-01-19 [PMID: 36706760] (FLOW, IHC-Fr, Mouse) FLOW, IHC-Fr Mouse
Aung A, Cui A, Maiorino L et al. Low protease activity in B cell follicles promotes retention of intact antigens after immunization Science (New York, N.Y.) 2023-01-27 [PMID: 36701450] (ELISA, Mouse) ELISA Mouse
Salarian M, Ghim M, Toczek J et al. Homeostatic, Non-Canonical Role of Macrophage Elastase in Vascular Integrity Circulation research 2023-01-24 [PMID: 36691905] (ELISA, Mouse)

Mouse plasma
Chakraborty S Complement factors in murine jejunum mucus and their functional alteration after experimental sepsis Thesis 2021-01-01 (ELISA, Mouse) ELISA Mouse
Liu XL, Sun DD, Zheng MT et al. Maraviroc promotes recovery from traumatic brain injury in mice by suppression of neuroinflammation and activation of neurotoxic reactive astrocytes Neural Regeneration Research 2023-01-01 [PMID: 35799534] (ICC/IF, WB) ICC/IF, WB
Davidson S Defining the pro-tumour impact of the evolving stromal microenvironment Thesis 2020-01-01
Show All 30 Publications.

Reviews for Complement C3 Antibody (NB200-540) (2) 4.52

Average Rating: 4.5
(Based on 2 reviews)
We have 2 reviews tested in 1 species: Mouse.

Reviews using NB200-540:
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Images Ratings Applications Species Date Details
Flow Cytometry Complement C3 NB200-540
reviewed by:
Francesca Azar
Flow Mouse 05/16/2019


ApplicationFlow Cytometry
Sample TestedBreast tumor


CommentsDespite some issues with our secondary antibody, this antibody worked well for flow cytometry analysis of mouse tumor tissue.
reviewed by:
Verified Customer
ICC Mouse 04/01/2017


Sample Testedbrain and spinal cord

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FAQs for Complement C3 Antibody (NB200-540). (Showing 1 - 1 of 1 FAQs).

  1. I am trying to establish a method to measure mice C3 levels by nephelometry. I would be most grateful if you could provide me with some help, regarding the choice of the Ab. I totally understand that since such a method has never been tried, I do not expect any guaranties. 
    • We have never performed nephelometry in our lab, and do not have a protocol or advice to provide about this application. However, it seems to me that you should choose an antibody that is capable of recognizing its target in its folded conformation. Therefore, I would suggest trying an antibody that has been validated for ICC or IHC.

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Blogs on Complement C3.

Complement C3 - The Most Important Protein in the Complement System
The complement system is made up of a collection of proteins found in the bloodstream and is comprised of nine major complement proteins; complement C3 is one of them. The complement system is a crucial component of the cellular immune system becau...  Read full blog post.

mFluor Violet Conjugated Antibodies

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Recent Reviews


Francesca Azar
Application: Flow
Species: Mouse

Verified Customer
Application: ICC
Species: Mouse


Gene Symbol C3