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R718 Rat Anti-Mouse C1q
Product Details
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BD OptiBuild™
Complement C1q; Complement Component 1q; Complement protein C1q
Mouse (Tested in Development)
Rat IgG1, κ
Mouse C1q
Flow cytometry (Qualified)
0.2 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation And Storage

Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to the dye under optimum conditions that minimize unconjugated dye and antibody.

Recommended Assay Procedures

BD® CompBeads can be used as surrogates to assess fluorescence spillover (compensation). When fluorochrome conjugated antibodies are bound to BD® CompBeads, they have spectral properties very similar to cells. However, for some fluorochromes there can be small differences in spectral emissions compared to cells, resulting in spillover values that differ when compared to biological controls. It is strongly recommended that when using a reagent for the first time, users compare the spillover on cells and BD® CompBeads to ensure that BD® CompBeads are appropriate for your specific cellular application.

Product Notices

  1. Please refer to for technical protocols.
  2. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
  3. An isotype control should be used at the same concentration as the antibody of interest.
  4. Please refer to to access safety data sheets (SDS).
  5. This product is provided under an Agreement between BIOTIUM and BD Biosciences. This product, and only in the amount purchased by buyer, may be used solely for buyer’s own internal research, in a manner consistent with the accompanying product literature. No other right to use, sell or otherwise transfer (a) this product, or (b) its components is hereby granted expressly, by implication or by estoppel. This product is for research use only. Diagnostic uses require a separate license from Biotium, Inc. For information on purchasing a license to this product including for purposes other than research, contact Biotium, Inc., 3159 Corporate Place, Hayward, CA 94545, Tel: (510) 265-1027. Fax: (510) 265-1352. Email:
  6. Alexa Fluor™ is a trademark of Life Technologies Corporation.
  7. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  8. The production process underwent stringent testing and validation to assure that it generates a high-quality conjugate with consistent performance and specific binding activity. However, verification testing has not been performed on all conjugate lots.
  9. Researchers should determine the optimal concentration of this reagent for their individual applications.
756681 Rev. 1
Antibody Details
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The RmC7H8 monoclonal antibody specifically recognizes the C1q component of the mouse macromolecular C1 complex. The complex is comprised of C1q and 2 molecules each of the serine proteases, C1r and C1q. The C1 macromolecular complex, C1qC1r2C1s2, is bound together by Ca2+ ions. C1q is a serum protein that is synthesized by macrophages and microglia. It exists as an ~460 kDa protein formed from 18 polypeptide chains comprised of three different subunits named C1qa, C1qb, and C1qc. Each chain contains an N-terminal collagen-like sequence and a C-terminal globular gC1q module. Structural studies reveal that C1q is formed as a hexamer with 6 collagen-like triple helices, forming a central fiber bundle, each extended by globular domains. C1q is a multifunctional protein that can regulate a variety of cellular processes in addition to activating the classical complement pathway (CCP). C1q globular regions mediate target recognition such as binding to the Fc regions of IgG and IgM antibodies found in immune complexes including antibodies bound to pathogens or target cells and subsequent activation of the CCP. The C1q globular regions can also bind to bacterial and viral surface proteins as well as altered self elements including histones, DNA, and annexins on the surface of apoptotic or necrotic cells. The enhanced phagocytosis mediated through interaction of bound C1q with various receptors expressed by phagocytes, possibly combined with further complement activation and opsonization of cells, may contribute to the safe removal of stressed or dead cells that are pro-inflammatory. Conformational changes in target bound C1q's collagen-like regions can lead to interaction with and activation of the C1r and C1s proteases which result in activation of the CCP.

756681 Rev. 1
Format Details
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The BD Horizon™ Red 718 (R718) Dye is part of the BD red family of dyes. It is a small organic fluorochrome with an excitation maximum (Ex Max) at 695-nm and an emission maximum (Em Max) at 718-nm. Driven by BD innovation, R718 is designed to be excited by the red laser (627–640-nm) and detected using an optical filter centered near 720-nm (e.g., a 720/40-nm bandpass filter). R718 is a brighter alternative to Alexa Fluor™ 700. R718 is also a bright small molecule alternative to APC-R700 with lower spread into the APC detector. Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Red 627-640 nm
695 nm
718 nm
756681 Rev.1
Citations & References
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View product citations for antibody "756681" on CiteAb

Development References (8)

  1. Abbitt KB, Cotter MJ, Ridger VC, Crossman DC, Hellewell PG, Norman KE. Antibody ligation of murine Ly-6G induces neutropenia, blood flow cessation, and death via complement-dependent and independent mechanisms.. J Leukoc Biol. 2009; 85(1):55-63. (Clone-specific: Immunofluorescence). View Reference
  2. Ankeny DP, Guan Z, Popovich PG. B cells produce pathogenic antibodies and impair recovery after spinal cord injury in mice.. J Clin Invest. 2009; 119(10):2990-9. (Biology). View Reference
  3. Kang YS, Do Y, Lee HK, et al. A dominant complement fixation pathway for pneumococcal polysaccharides initiated by SIGN-R1 interacting with C1q.. Cell. 2006; 125(1):47-58. (Clone-specific: Functional assay). View Reference
  4. Libert C, Wielockx B, Grijalba B, et al. The role of complement activation in tumour necrosis factor-induced lethal hepatitis.. Cytokine. 1999; 11(8):617-25. (Clone-specific: Inhibition, In vivo exacerbation). View Reference
  5. Lubbers R, van Essen MF, van Kooten C, Trouw LA. Production of complement components by cells of the immune system.. Clin Exp Immunol. 2017; 188(2):183-194. (Biology). View Reference
  6. Schuh R, Kremmer E, Ego E, Wasiliu M, Thierfelder S. Determination of monoclonal antibody specificity by immunoadsorption and western blotting.. J Immunol Methods. 1992; 152(1):59-67. (Immunogen: ELISA, Immunoprecipitation). View Reference
  7. Thielens NM, Tedesco F, Bohlson SS, Gaboriaud C, Tenner AJ. C1q: A fresh look upon an old molecule. Mol Immunol. 2017; 89:73-83. (Biology). View Reference
  8. Zachrau B, Finke D, Kropf K, Gosink HJ, Kirchner H, Goerg S. Antigen localization within the splenic marginal zone restores humoral immune response and IgG class switch in complement C4-deficient mice.. Int Immunol. 2004; 16(12):1685-90. (Clone-specific: Immunohistochemistry). View Reference
View All (8) View Less
756681 Rev. 1

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Global - Refer to manufacturer's instructions for use and related User Manuals and Technical data sheets before using this products as described

Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims.  Comparisons are not made against non-BD technologies, unless otherwise noted.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.