Date published: 2026-5-7

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C1s Antibody (D-6): sc-365273

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Datasheets
  • C1s Antibody (D-6) is a mouse monoclonal IgG2b κ C1s antibody, cited in 4 publications, provided at 200 µg/ml
  • raised against amino acids 140-208 mapping within an internal region of C1s of human origin
  • C1s Antibody (D-6) is recommended for detection of mature C1 esterase and C1s precursor of human origin by WB, IP, IF and ELISA
  • Anti-C1s Antibody (D-6) is available conjugated to agarose for IP; HRP for WB, IHC(P) and ELISA; and to either phycoerythrin or FITC for IF, IHC(P) and FCM
  • also available conjugated to Alexa Fluor® 488, Alexa Fluor® 546, Alexa Fluor® 594 or Alexa Fluor® 647 for WB (RGB), IF, IHC(P) and FCM, and for use with RGB fluorescent imaging systems, such as iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • also available conjugated to Alexa Fluor® 680 or Alexa Fluor® 790 for WB (NIR), IF and FCM; for use with Near-Infrared (NIR) detection systems, such as LI-COR®Odyssey®, iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • also available conjugated to biotin for WB, IHC(P) and ELISA
  • At present, we have not yet completed the identification of the preferred secondary detection reagent(s) for C1s Antibody (D-6). This work is in progress.
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C1s Antibody (D-6) is a mouse monoclonal IgG2b kappa light chain antibody that detects C1s protein of human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), and enzyme-linked immunosorbent assay (ELISA). anti-C1s antibody (D-6) is available in both non-conjugated and various conjugated forms, including agarose, horseradish peroxidase (HRP), phycoerythrin (PE), fluorescein isothiocyanate (FITC), and multiple Alexa Fluor® conjugates. C1s protein plays a crucial role in the complement system, specifically as part of the C1 complex, which is essential for the initiation of the classical pathway of complement activation. This pathway is vital for immune responses, as C1s helps to opsonize pathogens, promote inflammation, and facilitate the clearance of immune complexes. The C1 complex, composed of C1q, C1r, and C1s, operates as a calcium-dependent trimolecular complex, where C1s is activated into a disulfide-linked heterodimer consisting of a heavy chain and a light chain. Understanding C1s function is important because defects in the gene encoding for C1s can lead to selective C1s deficiency, a condition associated with an increased risk of autoimmune diseases. Using C1s (D-6) antibody in research can provide insights into the mechanisms of complement activation and implications in various immunological disorders.

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

C1s Antibody (D-6) References:

  1. Complement C1s activation in degenerating articular cartilage of rheumatoid arthritis patients: immunohistochemical studies with an active form specific antibody.  |  Nakagawa, K., et al. 1999. Ann Rheum Dis. 58: 175-81. PMID: 10364916
  2. Crystal structure of the catalytic domain of human complement c1s: a serine protease with a handle.  |  Gaboriaud, C., et al. 2000. EMBO J. 19: 1755-65. PMID: 10775260
  3. Molecular basis of a selective C1s deficiency associated with early onset multiple autoimmune diseases.  |  Dragon-Durey, MA., et al. 2001. J Immunol. 166: 7612-6. PMID: 11390518
  4. X-ray structure of the Ca2+-binding interaction domain of C1s. Insights into the assembly of the C1 complex of complement.  |  Gregory, LA., et al. 2003. J Biol Chem. 278: 32157-64. PMID: 12788922
  5. Complement determinations in human disease.  |  Glovsky, MM., et al. 2004. Ann Allergy Asthma Immunol. 93: 513-22; quiz 523-5, 605. PMID: 15609759
  6. Complexes between C1q and C3 or C4: novel and specific markers for classical complement pathway activation.  |  Wouters, D., et al. 2005. J Immunol Methods. 298: 35-45. PMID: 15847795
  7. Human plasma N-glycoproteome analysis by immunoaffinity subtraction, hydrazide chemistry, and mass spectrometry.  |  Liu, T., et al. 2005. J Proteome Res. 4: 2070-80. PMID: 16335952
  8. Probing the C4-binding site on C1s with monoclonal antibodies. Evidence for a C4/C4b-binding site on the gamma-domain.  |  Matsumoto, M., et al. 1989. J Immunol. 142: 2743-50. PMID: 2522968
  9. Complete cDNA sequence of human complement Cls and close physical linkage of the homologous genes Cls and Clr.  |  Tosi, M., et al. 1987. Biochemistry. 26: 8516-24. PMID: 2831944

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

C1s Antibody (D-6)

sc-365273
200 µg/ml
$322.00

C1s Antibody (D-6) AC

sc-365273 AC
500 µg/ml, 25% agarose
$424.00

C1s Antibody (D-6) HRP

sc-365273 HRP
200 µg/ml
$322.00

C1s Antibody (D-6) FITC

sc-365273 FITC
200 µg/ml
$336.00

C1s Antibody (D-6) PE

sc-365273 PE
200 µg/ml
$349.00

C1s Antibody (D-6) Alexa Fluor® 488

sc-365273 AF488
200 µg/ml
$364.00

C1s Antibody (D-6) Alexa Fluor® 546

sc-365273 AF546
200 µg/ml
$364.00

C1s Antibody (D-6) Alexa Fluor® 594

sc-365273 AF594
200 µg/ml
$364.00

C1s Antibody (D-6) Alexa Fluor® 647

sc-365273 AF647
200 µg/ml
$364.00

C1s Antibody (D-6) Alexa Fluor® 680

sc-365273 AF680
200 µg/ml
$364.00

C1s Antibody (D-6) Alexa Fluor® 790

sc-365273 AF790
200 µg/ml
$364.00

C1s Antibody (D-6) B

sc-365273 B
200 µg/ml
$326.00

Hello, I would like to know if you recommend C1S ANTIBODY (D-6) for detection of mouse C1s protein? Do you have any data on detection of mouse C1s protein in serum? Best, Arvan

Asked by: Arvan
Thank you for your question. C1s (D-6)antibody has not been validated to work on mouse samples. There is a 94 % homology so there is a possibility it will work well on mouse.
Answered by: BlakeJ
Date published: 2023-08-21

Hello, I'm testing mouse serums for c1s. I wonder if your D6 monoclonal (sc-365273) reacts to mouse c1s as well and whether you sell biotinylated version as well?

Asked by: IstvanBartok
Thank you for your question. We have not yet tested this antibody, C1s (D-6): sc-365273, for reactivity with C1s of mouse origin. We could provide this antibody conjugated to biotin as a special order. Please contact specialorders@scbt.com for more information. For a limited time, we are offering a free 10 µg sample of this antibody. Please contact our Technical Service Department if you would like to test the antibody before placing your order. Please call us toll-free at (800) 457-3801 option 2, e-mail <scbt@scbt.com>, or use the live chat on our website.
Answered by: Technical Support
Date published: 2017-10-31

What is the recommended starting dilution for Western blot for C1s Antibody (D-6): sc-365273?

Asked by: TinTin
The recommended starting dilution for Western blot is 1:100 with a dilution range of 1:100-1:1000. This information, along with other technical specifications, is available in the recommended Western blot protocol: https://www.scbt.com/scbt/resources/protocols/western-immuno-blotting
Answered by: Technical Support 15
Date published: 2017-01-24
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Rated 5 out of 5 by from Works for WB.I used for WB in Human tumor cell lysate and works perfectly.
Date published: 2022-11-02
Rated 5 out of 5 by from Works wellWorks well in western blot of the ovine thymic tissue.
Date published: 2021-11-28
Rated 5 out of 5 by from Works fine in WBWorks in human serum and fibroblast lysates in western blot
Date published: 2018-05-30
Rated 4 out of 5 by from WBThere was a weak 90kd band in thp1 samples by WB..
Date published: 2017-01-19
Rated 5 out of 5 by from Excellent antibodyC1s Antibody (D-6) is an excellent replacement for polyclonal C1s with all around better performance in WB and IF applications.
Date published: 2017-01-04
Rated 5 out of 5 by from Produced exceptional immunofluorescence cellProduced exceptional immunofluorescence cell surface staining in methanol-fixed HeLa cells. -SCBT QC
Date published: 2015-05-15
Rated 5 out of 5 by from Satisfactory Western Blot data of C1s expressionSatisfactory Western Blot data of C1s expression in non-transfected, human C1s transfected 293T whole cell lysates and human platelet extract . -SCBT QC
Date published: 2013-03-19
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C1s Antibody (D-6) is rated 4.9 out of 5 by 7.
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