Recombinant Anti-C4b antibody [EPR11203-27] (ab181241)
Key features and details
- Produced recombinantly (animal-free) for high batch-to-batch consistency and long term security of supply
- Rabbit monoclonal [EPR11203-27] to C4b
- Suitable for: WB, IHC-P, ICC/IF
- Reacts with: Human
Related conjugates and formulations
Overview
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Product name
Anti-C4b antibody [EPR11203-27]
See all C4b primary antibodies -
Description
Rabbit monoclonal [EPR11203-27] to C4b -
Host species
Rabbit -
Specificity
The immunogen used for this product shares 96% homology with C4a. Cross-reactivity with this protein has not been confirmed experimentally.
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Tested applications
Suitable for: WB, IHC-P, ICC/IFmore details -
Species reactivity
Reacts with: Human -
Immunogen
Recombinant fragment. This information is proprietary to Abcam and/or its suppliers.
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Positive control
- ICC/IF: HepG2 cells; IHC: Human liver tissue; WB: HepG2 whole cell lysate. Human plasma and serum lysates. Human liver, heart and testis tissue lysates.
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General notes
This product is a recombinant monoclonal antibody, which offers several advantages including:
- - High batch-to-batch consistency and reproducibility
- - Improved sensitivity and specificity
- - Long-term security of supply
- - Animal-free production
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.
Properties
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Form
Liquid -
Storage instructions
Shipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C long term. Avoid freeze / thaw cycle. -
Storage buffer
Preservative: 0.01% Sodium azide
Constituents: 59% PBS, 40% Glycerol (glycerin, glycerine), 0.05% BSA -
Concentration information loading...
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Purity
Protein A purified -
Clonality
Monoclonal -
Clone number
EPR11203-27 -
Isotype
IgG -
Research areas
Associated products
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Alternative Versions
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Isotype control
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Positive Controls
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Recombinant Protein
Applications
The Abpromise guarantee
Our Abpromise guarantee covers the use of ab181241 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
Application | Abreviews | Notes |
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WB |
1/10000. Detects a band of approximately 90,190 kDa (predicted molecular weight: 193 kDa).
For unpurified use at 1/1000-1/2000 dilution |
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IHC-P |
1/75. Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol.
For unpurified use at 1/250 |
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ICC/IF |
1/100.
For unpurified use at 1/500 |
Notes |
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WB
1/10000. Detects a band of approximately 90,190 kDa (predicted molecular weight: 193 kDa). For unpurified use at 1/1000-1/2000 dilution |
IHC-P
1/75. Perform heat mediated antigen retrieval with Tris/EDTA buffer pH 9.0 before commencing with IHC staining protocol. For unpurified use at 1/250 |
ICC/IF
1/100. For unpurified use at 1/500 |
Target
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Function
C4 plays a central role in the activation of the classical pathway of the complement system. It is processed by activated C1 which removes from the alpha chain the C4a anaphylatoxin. The remaining alpha chain fragment C4b is the major activation product and is an essential subunit of the C3 convertase (C4b2a) and the C5 convertase (C3bC4b2a) enzymes of the classical complement pathway.
Derived from proteolytic degradation of complement C4, C4a anaphylatoxin is a mediator of local inflammatory process. It induces the contraction of smooth muscle, increases vascular permeability and causes histamine release from mast cells and basophilic leukocytes. -
Sequence similarities
Contains 1 anaphylatoxin-like domain.
Contains 1 NTR domain. -
Post-translational
modificationsPrior to secretion, the single-chain precursor is enzymatically cleaved to yield the non-identical chains (alpha, beta and gamma). During activation, the alpha chain is cleaved by C1 into C4a and C4b, and C4b stays linked to the beta and gamma chains. Further degradation of C4b by C1 into the inactive fragments C4c and C4d blocks the generation of C3 convertase. -
Cellular localization
Secreted. - Information by UniProt
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Database links
- Entrez Gene: 100293534 Human
- Entrez Gene: 100507685 Human
- Entrez Gene: 720 Human
- Entrez Gene: 721 Human
- Omim: 120820 Human
- SwissProt: P0C0L4 Human
- SwissProt: P0C0L5 Human
- Unigene: 534847 Human
see all -
Alternative names
- Basic complement C4 antibody
- C2B5 antibody
- C3 and PZP-like alpha-2-macroglobulin domain-containing protein 3 antibody
see all
Images
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All lanes : Anti-C4b antibody [EPR11203-27] (ab181241) at 1/10000 dilution (purified)
Lane 1 : HepG2 (Human hepatocellular carcinoma epithelial cell) whole cell lysate at 15 µg
Lane 2 : Human plasma lysate at 15 µg
Lane 3 : Human serum lysate at 20 µg
Secondary
All lanes : Goat Anti-Rabbit IgG (HRP) with minimal cross-reactivity with human IgG at 1/2000 dilution
Predicted band size: 193 kDa
Observed band size: 200,70,93 kDa why is the actual band size different from the predicted?The molecular weights observed are consistent with what have been described in the literature (PMID: 15632414, 31178241 and 30210498).
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Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human liver tissue sections labeling C4b with purified ab181241 at 1/75 dilution (9.53 µg/mL). Heat mediated antigen retrieval using Bond™ Epitope Retrieval Solution 2 (pH 9.0) . Rabbit specific IHC polymer detection kit HRP/DAB (ab209101) was used as the secondary antibody. Negative control: PBS instead of the primary antibody. Hematoxylin was used as a counterstain.
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All lanes : Anti-C4b antibody [EPR11203-27] (ab181241) at 1/10000 dilution (purified)
Lane 1 : Human liver lysate
Lane 2 : Human heart lysate
Lane 3 : Human testis lysate
Lysates/proteins at 20 µg per lane.
Secondary
All lanes : Goat Anti-Rabbit IgG (HRP) with minimal cross-reactivity with human IgG at 1/2000 dilution
Predicted band size: 193 kDa
Observed band size: 200,70,93 kDa why is the actual band size different from the predicted?The molecular weights observed are consistent with what have been described in the literature (PMID: 15632414, 31178241 and 30210498).
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Immunocytochemistry/ Immunofluorescence analysis of HepG2 (Human hepatocellular carcinoma epithelial cell) cells labeling C4b with purified ab181241 at 1/100 dilution (10 µg/mL). Cells were fixed in 4% Paraformaldehyde and permeabilized with 0.1% TritonX-100. Cells were counterstained with Ab195889 Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker (Alexa Fluor® 594) 1/200 (2.5 µg/ml). Goat anti rabbit IgG (Alexa Fluor® 488, ab150077) was used as the secondary antibody at 1/1000 (2 µg/mL) dilution. DAPI (blue) was used as nuclear counterstain. PBS instead of the primary antibody was used as the secondary antibody only control.
Protocols
Datasheets and documents
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SDS download
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Datasheet download
Certificate of Compliance
References (3)
ab181241 has been referenced in 3 publications.
- Bai B et al. Deep Multilayer Brain Proteomics Identifies Molecular Networks in Alzheimer's Disease Progression. Neuron 105:975-991.e7 (2020). PubMed: 31926610
- Bottermann M et al. Complement C4 Prevents Viral Infection through Capsid Inactivation. Cell Host Microbe 25:617-629.e7 (2019). PubMed: 30926239
- Arya S et al. Quantitative analysis of hydroxyapatite-binding plasma proteins in genotyped individuals with late-stage age-related macular degeneration. Exp Eye Res 172:21-29 (2018). PubMed: 29580721