Active Complement Component 4a (C4a)
C4a anaphylatoxin
- UOM
- FOB US$ 232.00 US$ 580.00 US$ 1,160.00 US$ 3,480.00 US$ 8,700.00
- Quantity
Overview
Properties
- Product No.APA389Hu01
- Organism SpeciesHomo sapiens (Human) Same name, Different species.
- ApplicationsCell culture; Activity Assays.
Research use only - DownloadInstruction Manual
- CategoryImmune moleculeEndocrinology
- Buffer FormulationPBS, pH7.4, containing 0.01% SKL, 5% Trehalose.
- Traits Freeze-dried powder, Purity > 90%
- Isoelectric Point8.4
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Activity test

Complement Component 4a (C4a) is a component of the complement system, which is a cleavage product of the complement C4 protein. C4a has been implicated in various inflammatory and immune responses. It acts as a chemoattractant, recruiting immune cells such as neutrophils and macrophages to the site of inflammation. Additionally, C4a can stimulate the release of pro-inflammatory cytokines and chemokines, further amplifying the immune response. C4a and C4b are the two subunits of C4, thus a functional binding ELISA assay was conducted to detect the interaction of recombinant human C4a and recombinant mouse C4b. Briefly, C4a was diluted serially in PBS with 0.01% BSA (pH 7.4). Duplicate samples of 100 μl were then transferred to C4b-coated microtiter wells and incubated for 1h at 37℃. Wells were washed with PBST and incubated for 1h with anti-C4a pAb, then aspirated and washed 3 times. After incubation with HRP labelled secondary antibody for 1h at 37℃, wells were aspirated and washed 5 times. With the addition of substrate solution, wells were incubated 15-25 minutes at 37℃. Finally, add 50 µL stop solution to the wells and read at 450/630 nm immediately. The binding activity of recombinant human C4a and recombinant mouse C4b was shown in Figure 1,and this effect was in a dose dependent manner.
Usage
Reconstitute in 10mM PBS (pH7.4) to a concentration of 0.1-1.0 mg/mL. Do not vortex.
Storage
Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months.
Stability
The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.
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Citations
- Circulation levels of acute phase proteins in patients with Takayasu arteritisPubMed: 20100644
- Identification of Altered Plasma Proteins by Proteomic Study in Valvular Heart Diseases and the Potential Clinical SignificancePubMed: PMC3754973
- Higher Serum Angiotensinogen Is an Indicator of IgA Vasculitis with Nephritis Revealed by Comparative Proteomes AnalysisPubMed: 26098644
- Plasma Protein Biomarkers of Hepatocellular Carcinoma in HCV-Infected Alcoholic Patients with CirrhosisPubMed: 25789864
- Quantitative analysis of hydroxyapatite-binding plasma proteins in genotyped individuals with late-stage age-related macular degenerationPubmed:29580721
- Systemic Alterations of Immune Response-Related Proteins during Glaucoma Development in the Murine Model DBA/2JPubmed: 32585848
- Maternal Serum Proteomic Profiles of Pregnant Women With Type 1 Diabetes34940989